service bulletin - BellCustomer.com
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1. Connect power supply module output plug to receptacle labeled as J101 on the programming interface box 12 If PC does not have 9 pin serial port install USB to serial converter to one of the USB ports if not already installed This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 8 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 13 24 25 Connect one end of the 9 pin RS232 cable to the 9 pin serial port on the PC or USB to serial converter Connect the other end of the 9 pin RS232 cable to the receptable labeled as J102 on the interface box Plug the AC power cord into a 110 240VAC 50 60 Hz outlet Set the power switch on the programming box to PWR ON From the Windows toolbar click on Start gt Programs gt Maintenance Terminal If running Maintenance Terminal version 2 00 or 2 01 click on Maintenance Terminal If running Maintenance Terminal 2013 version 2 3 right click on Maintenance Terminal and select Run as administrator This is only necessary for the first time the Maintenance Terminal version 2 3 is used lf prompted for a password enter the existing password or password supplied during registration of Maintenance Terminal version 2 3 and click OK From the MTerm main menu click on File gt Select COM port Note2. C Expendable Parts None CUSTOMER SUPPORT ROLLS ROYCE May 29 2014 M250 C47 Series CEB 73 6060 Page 3 of 3 2014 Rolls Royce Corporation _ p Triumph Engine Control Systems A Tiumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 Triumph Engine Control Systems Model EMC 35R Electronic Control Unit Assembly Software Upgrade for Rolls Royce 250 C47B Engine 1 Planning Information A Effectivity C Applicable to the Triumph Engine Control Systems Triumph model EMC 35R Electronic Control Unit Assembly ECU part numbers 115220 1A5 20 115220 1A5 23 and 115220 2A5 23 Rolls Royce Part Numbers 23080490 23088484 and 23088856 respectively as components of the Rolls Royce 250 C47B engine Reason To upgrade part number 115220 1A5 20 115220 1A5 23 or 115220 2A5 23 Rolls Royce Part Number 23080490 23088484 or 23088856 respectively to part number 115220 1A5 24 or 115220 2A5 24 Rolls Royce part numbers M250 10695 and M250 10696 respectively by changing the embedded software for the Primary governor from version 257 5356 20 or 257 5358 23 to 257 5400 and the embedded software for the Reversionary governor from version 681 9026 20 or 681 9029 23 to 681 9100 The primary objective of the new software is to make the power up and shutdown overspeed tests compatible with the overspeed adapter Rolls Royce P N M250 10684 that is installed between the engine harness and fire
3. software version by a supplemental identification a k a CRC check The operator is required to verify and document that the software version and supplemental identifier number are correct The operator is also required to verify and document that the engine history data displayed after software upload are identical to those displayed before upload It is not possible to end up with a dead ECU due to a unsuccessful upload regardless of the cause The boot loader code is resident in the ECU flash memory and cannot be corrupted by a terminated upload Once power is cycled with the programming switch in the active state the boot loader restarts execution and is again ready to receive programming instructions and data from the PC Configuration control is maintained by removing the identification plate prior to the software change and by changing the unit part number onto a new identification plate and on applicable documents after the ECU is programmed with the new software D Compliance At customer discretion but only in conjunction with or after the installation of the overspeed adapter Rolls Royce P N M250 10684 per Rolls Royce CEB A 73 6059 E Approval Technical aspects are FAA approved F Manpower All work is to be performed by FAA authorized personnel only Approximately 1 0 man hour is required to accomplish this upgrade G Material Price and Availability ECU Identification Plate 113417 1 Screw Self Tapping MS51
4. 4 Browse to C temp EMC35_TTOLLI and click on the Start shortcut 5 The following dialogue box will appear This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 11 of 27 Rolls Royce Proprietary Document Nu Y Triumph Engine Control Systems A Tiumoh Group Company EMC 35R ECU 73 10 SERVICE BULLETIN EE EMC 35 ECU TTOLLI Do you want to run the ECU TTOLLI Software Tool Triumph Engine Control Systems support Brian Beal Email bcbeal triumphgroup com 1 660 794 9833 Tera Term On Line Loader Interface TTOLLI Version C 1906 0001 6 Click on Yes The following dialogue box will appear and prompt for the COM port number EMC 35 ECU TTOLLI Enter Serial Communications Port Number 1 7 Enter the serial communications port number which was determined in step 2 E or 2 F 20 Click on OK 8 If the port is already in use the following message will be displayed me were FMC 35 ECU TTOLLI ERROR connection with the specified serial port can t be made Yerify the port is notin use by another application This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 12 of 27 Rolls Royce Proprietary Document Nu Y Triumph Engine Control Systems A Triumph Group Company SERVICE BULLETIN 73 10 9 If this error occurs it must determined which applications are alread
5. ECU J2 connector Plug the circular plug on the programming interface cable into the J2 connector on ECU Plug the 15 pin D connector on the programming interface cable labeled as P104 into the J104 connector on the programming interface box 8 Set the programming switch on the programming interface box to center OFF ECUIC position 9 Set the power switch position on the programming interface box to OFF 10 Connect AC power cord to power supply module 11 Connect power supply module output plug to receptacle labeled as J101 on the programming interface box 12 If PC does not have a 9 pin serial port install USB to serial converter to one of the USB ports if not already installed 13 Connect one end of the 9 pin RS232 cable to the 9 pin serial port on the PC or USB to serial converter 14 Connect the other end of the 9 pin RS232 cable to the receptacle labeled as J102 on the interface box 15 Plug the AC power cord into a 110 240VAC 50 60 Hz outlet H Re program the Primary Governor NOTE Itis recommended that this paragraph H and subsequently paragraph I be performed without interruption Plan for a minimum of 20 minutes to complete both paragraphs 1 Connect equipment as described in paragraph 2 G above 2 Set the switch on the programming box to PRIMARY PROGRAM full down position 3 Set the power switch on the programming box to PWR ON
6. Helicopter Alert Service Bulletin ASB 407 14 102 BHT 407 FM 1 Flight Manual Temporary Revision 14 BHT 407 FM 2 Flight Manual Temporary Revision 4 Rolls Royce Corporation ALERT Commercial Engine Bulletin CEB A 73 6059 Rolls Royce Corporation Commercial Engine Bulletin CEB 73 6060 Rolls Royce Corporation Commercial Service Letter CSL 6125 Triumph Engine Control Systems TECS Service Bulletin SB 73 10 PUBLICATIONS AFFECTED BHT 407 IPB Illustrated Parts Breakdown Chapters 11 76 95 and 96 BHT 407 MM Maintenance Manual Chapters 11 71 76 95 and 96 BHT 407 FM 1 Flight Manual BHT 407 FM 2 Flight Manual BHT 407 MD 1 Manufacturer s Data BHT 407 MD 2 Manufacturer s Data TB 407 14 111 Page 3 of 6 Export Classification C ECCN EAR99 Approved for public release ACCOMPLISHMENT INSTRUCTIONS NOTE Compliance with Part I of the ASB 407 14 102 Rolls Royce Corporation CEB A 73 6059 shall be accomplished prior to or concurrently with this Technical Bulletin This installs the engine adapter P N M250 10684 to the helicopter FADEC harness 1 Refer to the Rolls Royce Corporation RRC Commercial Engine Bulletin CEB 73 6060 to verify applicability of this bulletin to the ECU part number installed on the helicopter a If the ECU is affected do step 2 b If the ECU is not affected do step 8 2 Prepare the helicopter for maintenance 3 Perform the Accomplishment Instructions of the Rolls Royce CEB 73 6060 and t
7. TERMINATE NOTE It will take approximately 6 minutes to program the Primary governor It is recommended to move the mouse every 2 3 minutes to prevent the PC from going to sleep during the programming process which could terminate the upload and lock up the serial port 19 When programming the Primary governor is complete the transfer status box will close and a message box will be displayed as shown below EE EMC 35 ECU TTOLLI 20 Click on OK The TTOLLI will then read back the uploaded version of software from the ECU and display it as shown below Record confirmation of the Primary governor software version the on record data sheet Appendix A paragraph 1 E 1 EE EMC 35 ECU TTOLLI 21 Click on OK The TTOLLI will then read the supplemental identifier from the ECU and display it as shown below Record confirmation of the Primary governor supplemental identifier on the record data sheet Appendix A paragraph 1 E 2 EE EMC 35 ECU TTOLLI 22 Click on OK A status box will be displayed indicating that programming of the Primary governor is complete EMC 35 ECU TTOLLI Primary Channel ECU re program operation is now complete 23 Set the power switch on the programming box to OFF This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 15 of 27 Rolls Royce Proprietary Document Nu Y Triumph Engine Control Systems A Tiumoh Group Comp
8. clicking on File gt Exit on toolbar at top of Mterm window 22 Set the power switch position on the programming interface box to OFF K Disconnect Equipment and Re connect ECU to Aircraft 1 Ensure the power switch on the interface box to the OFF position 2 3 Connect airframe harness to J2 connector on ECU 4 Disconnect the circular plug on the interface cable from the J2 connector on ECU Re install cable clamp closest to ECU J2 connnector This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 21 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN L Re identify the ECU 1 Replace the identification plate previously removed in step 2 G 1 with a new identification plate 5 Figure 1 using four new screws 10 Figure 1 showing the appropriate Triumph part number see Table below Record compliance after new identification plate is installed on record data sheet Appendix A paragraph G 1 Existing Part Number New Part Number 115220 1A5 20 23080490 115220 1A5 24 M250 10695 115220 1A5 23 23088484 115220 1A5 24 M250 10695 115220 2A5 23 23088856 115220 2A5 24 M250 10696 Verify that the ECU serial number on the identification plate matches the ECU serial number recorded on the record data sheet Appendix A paragraph C 1 Record compliance on the record data
9. declare faults OSCnfigFIt and OSFIt if adapter is not detected The overspeed shutdown test will now function with the adapter installed 2 Improvement in the NG Fault detection including eliminating nuisance faults on shutdown 3 Added fault detection on starter circuit to check for a stuck on condition 4 Improvement in Incident recorder detection logic 5 Improvement in the igniter circuit fault detection logic 6 Elimination of nuisance Watch Dog Timer faults in the reversionary governor 7 Improvement in the primary to reversionary governor hand off logic For C47M operators new software is planned to make the above changes This bulletin will be revised at that time to include the C47M part numbers and compliance information May 29 2014 M250 C47 Series CEB 73 6060 Page 1 of 3 2014 Rolls Royce Corporation EXPORT CONTROLLED Rolls Royce COMMERCIAL ENGINE BULLETIN D Approval Technical aspects are FAA approved E Compliance Compliance Code 7 To be complied with per customer option Interchangeability See Prerequisites G Material Availability NEW P N NAME QTY ENG M250 10695 Engine Control Unit M250 10696 Engine Control Unit H Tooling See attached Triumph bulletin Weight and Balance Not affected J Electrical Load Data Not affected K References 1 Advance Engineering Memorandum AEM CW500020268050 NOTE The document above is referenced for the internal use of Rolls
10. of this bulletin to any spare part shall be determined prior to its installation on an affected helicopter APPROVAL The engineering design aspects of this bulletin are Transport Canada Civil Aviation TCCA approved TB 407 14 111 Page 1 of 6 Export Classification C ECCN EAR99 Approved for public release CONTACT INFO For any questions regarding this bulletin please contact Bell Helicopter Product Support Engineering Light Helicopters Tel 450 437 2862 1 800 363 8023 pselight bh com MANPOWER Approximately 2 0 man hours are required to complete this bulletin This estimate is based on hands on time and may vary with personnel and facilities available WARRANTY There is no warranty credit applicable for parts or labor associated with this bulletin MATERIAL Required Material The following material is required for the accomplishment of this bulletin and may be obtained through your Bell Helicopter Textron Supply Center Part Number Nomenclature Qty Notes 407 075 011 115 DECAL 5 400 DRM 1 Note 1 and 3 407 075 206 133 DECAL 5 400 DRM 1 Note 2 and 4 113417 1 ECU IDENTIFICATION PLATE 1 Note 5 MS51861 1C SCREW SELF TAPPING 4 Note 5 Notes 1 Decal required for the standard 407 S N 53000 through 54299 2 Decal required for the 407GX S N 54300 through 54570 3 The decal may be locally manufactured using lettering of white color No 17875 on a black background color No 17038 per FED STD595 Charac
11. the active COM port The active COM port number will be required as part of the ECU programming steps Click OK Initiate MTerm communications with the ECU by clicking on the connect icon at top left of MTerm window Verify the following information from the Component Serial Numbers screen Record compliance on record data sheet Appendix A paragraph 1 A a ECU Software Version 257 5356 and Supplemental ID 6058 OR b ECU Software Version 257 5358 and Supplemental ID 211A Record the following serial number information from the screen on the record data sheet Appendix A paragraph 1 C a ECU S N Engine S N Compressor S N HMU S N Aircraft ID Turbine S N g Eng Gearbox S N Click on OK On MTerm main menu click on Engine History gt View This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 9 of 27 Rolls Royce Proprietary Document SS Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN 26 Record the displayed values for the following engine history data on the record data sheet Appendix A paragraph 1 D a ECURnTm NpRLmPk NoRLmTm NumStrt OSCyc SgCtr EngRunCtr h NpLmPk NoLmTm OSCtr NoLmEvts NoRLmEvts does not apply to ECU software version 257 5356 NoMLmEvts NpExclnd does not apply to ECU software version 257 5356 does not apply t
12. 2 1 14 and 2 1 15 place a check mark in the brackets after verifying the following information from the after reprogramming of the Reversionary Governor 1 ECU Software Version 681 9100 2 ECU Supplemental ID 11C2 G As instructed in step 2 L 1 place a check mark in the brackets after verifying that the identification plate has been changed to reflect the new ECU part number and that the ECU serial number on the identification plate matches the serial number recorded in step C 1 above 1 Identification Plate changed 2 ECU serial number on identification plate matches serial number recorded in C 1 This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 26 of 27 Rolls Royce Proprietary Document NN Y Triumph Engine Control Systems EMC 35R ECU SERVICE BULLETIN 73 10 APPENDIX B A Triumph Group Company SERVICE BULLETIN COMPLIANCE DATA SHEET ECU Serial Number ECU Identification Plate Before EMC 35A ECU Service Bulletin 73 10 Triumph P N Rolls Royce P N ECU Identification Plate After EMC 35A ECU Service Bulletin 73 10 Triumph P N Rolls Royce P N The above ECU is in compliance with EMC 35R ECU Service Bulletin 73 10 Latest Revision Facility Company Address Date of Compliance Contact name Contact phone Engine serial number Aircraft serial number Submit the completed Service Bulletin Compliance Data Sheet thi
13. 861 1C Contact Triumph account manager for availability This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 2 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 Tooling 118737 1 SL EMG 35R ECU Programming Kit for C47B 35R ECU Programming Kit for C47B consisting of items 2 through 9 below _ CD118743 1 CD Bell 407 250 C47B FOSSA T 11527 4 Programming Interface Cable T 11527 5 Programming Interface Box 5 N A RS232 Extension Cable 6 foot or 2M D sub j 9 pin male to 9 pin female EA USA 19HS Keyspan USB to Serial Converter Universal 24 VDC Power Supply Module 7 N A 100 240VAC 50 60 Hz input 2 1 amps minimum output AC Power Cord Nema 5 15P IEC60320 C13 18 AWG min 3 a 6 foot minimum length 240 VAC min 10 CD118794 1 CD Maintenance Terminal 2013 a CD Bell 407 250 C47B Maintenance CD118758 1 Terminal Data Files 113972 3 Maintenance Terminal Interface Cable C 1912 Rev Maintenance Terminal User s Manual Personal Computer PC with Windows 14 N A XP 7 8 Operating System CDROM Drive and 9 Pin RS232 Serial Port or USB Port Small Phillips Head Screwdriver Contact Triumph Account Manager for availability This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 3 of 27 Roll
14. ION TO MANUAL INSTALLED REFER TO i FLIGHT MANUAL FOR OPERATION 0 52 IN 13 2 mm DETAIL B DECAL P N 407 075 206 133 FOR 407GX S N 54300 AND SUBSEQUENT 14531_001b Figure 1 Markings Installation Sheet 2 of 2 TB 407 14 111 Page 6 of 6 Export Classification C ECCN EAR99 Approved for public release EXPORT CONTROLLED COMMERCIAL ENGINE mais TN Rolls Royce ENGINE FUEL AND CONTROL NEW ECU SOFTWARE 1 PLANNING INFORMATION A Effectivity 1 Engines All Rolls Royce M250 C47B series engines with the following ECUs installed C47B 23080490 23088484 23088856 2 Spares Not affected B Reason The new software addresses the power up faults and overspeed shutdown test disable which were introduced with the adapter installed via CEB A 73 6059 C Description Installation of the false overspeed trip FOST adapter M250 10684 generates power up faults It also makes the overspeed test function inoperable With this software update the engine operation will be restored to normal operation prior to the adapter install The new software will also provide confirmation that the adapter is installed It will generate a fault if the adapter is NOT installed The following software changes are incorporated into this software version 1 Change the overspeed protection logic to accommodate the FOST adapter M250 10684 The software will now check for the presence of the adapter and
15. M drive This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 6 of 27 Rolls Royce Proprietary Document SS SO Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 C Install On Line Loader Software and Embedded ECU Software Files NOTE Itis not necessary to re install the On Line Loader software and embedded ECU Oe eu A A A A A A h D ee O ee ee 10 software files each time this service bulletin is accomplished Create a C temp folder on the PC if it does not already exist Insert Bell 407 250 C47B FOSSA CD CD118748 1 into the CDROM drive Browse to the CDROM drive Browse to IMAGE_CD118743 1_REV Right click on EMC35_TTOLLI folder and click Copy Browse to C right click on the temp folder and click on Paste Browse again to IMAGE_CD118743 1_REV on the CDROM drive Right click on Bell 407 EMC 35 Program Files folder and click Copy Browse again to C right click on the temp folder and click on Paste Remove the Bell 407 250 C47B FOSSA CD from the CDROM drive D Install USB to Serial Adapter and Software NOTE The USB to Serial adapter driver files only need to be installed if the PC does not have a 9 pin serial port or if another USB to Serial converter has not been installed previously Also it is not necessary to re install the driver files each time this service bulletin is accomplished In
16. Royce only 2 CSP 21001 Operation and Maintenance Manual Turboshaft Model M250 C47B OMM 3 CSP 23001 Illustrated Parts Catalog Turboshaft Models M250 C40B C47B C47M IPC Other Publications Affected M Prerequisites 1 Compliance with CEB A 73 6059 Paragraph 2 A Installation of the FOST adapter Part Number M250 10684 2 ACCOMPLISHMENT INSTRUCTIONS A See attached Triumph Service Bulletin EMC35R 73 10 Once you receive your software kit from Triumph verify part number and serial number information on the new data plate If there are discrepancies contact Rolls Royce and Triumph immediately Rolls Royce helicoptercustsupp rolls royce com Triumph TECSWH Support triumphgroup com B Record compliance with this CEB in the engine log book white pages and the component accessory card for the ECU May 29 2014 M250 C47 Series CEB 73 6060 Page 2 of 3 2014 Rolls Royce Corporation EXPORT CONTROLLED Rolls Royce COMMERCIAL ENGINE BULLETIN 3 MATERIAL INFORMATION A Configuration Chart QTY QTY INSTRUCTIONS NEW P N ENG NAME OLD P N ENG DISPOSITION M250 10695 Engine Control Unit 23080490 See Note 1 M250 10695 Engine Control Unit 23088484 1 See Note 1 M250 10696 Engine Control Unit 23088856 See Note 2 ECUs 23080490 and 23088484 are pre CEB 73 6052 NOTE ECU 23088856 has complied with CEB 73 6052 INSTRUCTIONS DISPOSITION NOTES 1 Software updated B Consumable Materials None
17. TOLLI 15 Click on OK The TTOLLI will then read the supplemental identifier from the ECU and display it as shown below Record confirmation of the supplemental identifier on the record data sheet Appendix A paragraph 1 F 2 EE EMC 35 ECU TTOLLI 16 Click on OK A status box will be displayed indicating that programming of the Reversionary governor is complete EMC 35 ECU TTOLLI Reversionary Channel ECU re program operation is now complete This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 19 of 27 Rolls Royce Proprietary Document Te EMC 35R Triumph Engine Control Systems A Triumph Group Company ECU 73 10 SERVICE BULLETIN 17 18 At the TTOLLI main menu dialogue box click on Cancel to exit the program EMC 359 ECU TTOLLI Read Version Primary Read Version Reversionary Cancel Triumph Engine Control Systems support Brian Beal Email bcbeal triumphgroup com 1 660 794 9833 Tera Term On Line Loader Interface TTOLLI ersion C 1906 0001 Set the power switch on the programming box to OFF J Verify Software Version Serial Numbers and Engine History Data After Reprogramming ECU 1 2 3 KD Move the 9 pin RS232 cable from the J103 receptacle on the programming interface box back to the J102 receptacle Set the programing switch to the center OFF ECUIC position Set the power switch p
18. ag BSL Helicopter A Textron Company TECHNICAL BULLETIN 407 14 111 3 July 2014 MODEL AFFECTED 407 SUBJECT ENGINE FADEC SOFTWARE _ V5 400 INTRODUCTION OF HELICOPTERS AFFECTED Serial numbers 53000 through 53900 53911 through 54175 and 54300 through 54570 Serial numbers 54176 through 54299 and 54571 and subsequent will have the intent of this bulletin accomplished prior to delivery COMPLIANCE At customer s option DESCRIPTION This Technical Bulletin provides the instructions to introduce the software Version 5 400 to the engine FADEC system of the Model 407 standard and 407GX Bell Helicopter Textron has been coordinating closely with Rolls Royce Corporation RRC to implement this software upgrade to resolve the FADEC faults associated with the introduction of the overspeed adapter per the ASB 407 14 102 as well as some other known Reversionary Governor faults that have been identified in the RRC Commercial Service Letter CSL 6125 The software upgrade will also be a terminating action to Part Ill of the ASB 407 14 102 that requires a 50 hour recurring functional check of the overspeed protection system and will be introduced as a revision to the subject ASB Compliance with Part I of the ASB 407 14 102 Rolls Royce Corporation ALERT CEB A 73 6059 must be accomplished prior to or concurrently with this Technical Bulletin This installs the engine adapter P N M250 10684 to the helicopter FADEC harness Applicability
19. any EMC 35R ECU 73 10 SERVICE BULLETIN Re Program the Reversionary Governor 1 Move the 9 pin RS232 cable from the J102 receptacle on the programming interface box to the J103 receptacle 2 Set the switch on the programming box to REVER PROGRAM full up position 3 Set the power switch on the programming box to PWR ON 4 A oe main menu dialogue box click on Program Reversionary and clic EMC 35 ECU TTOLLI Read Version Primary Read Version Reversionary Cancel Triumph Engine Control Systems support Brian Beal Email bcbeal triumphgroup com 1 660 794 9833 Tera Term On Line Loader Interface TTOLLI Version C 1906 0001 5 The TTOLLI will then display the current Reversionary governor software version as shown below may be C 00681 9026 or C 00681 9029 EE EMC 35 ECU TTOLLI 6 Click OK The following status box will be displayed EMC 35 ECU TTOLLI 4 software file must be selected to load into the ECU Reversionary Channel 7 An explorer window will open Browse to C temp Bell 407 EMC 35 Program Files and click on 681 9100 oll and then click on Open This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 16 of 27 Rolls Royce Proprietary Document Nu Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 8 A message box will be displayed to confir
20. estination folder for Maintenance Terminal will be displayed Click on Next A window identifying the default destination folder for the Maintenance Terminal icon will be displayed Click on Next A window indicating that the installation is completed will be displayed Click on Finish Remove the Maintenance Terminal Program CD from the CDROM drive B Install Maintenance Terminal Data Files for the Bell 407 NOTE Itis not necessary to re install the Maintenance Terminal data files from the CD for the Bell 407 software each time this service bulletin is accomplished The user must have administrator rights on the PC in order to install the software Insert the Bell 407 250 C47B Maintenance Terminal Data Files CD CD118758 1 into the CDROM drive From the Windows toolbar click on Start gt Run Click on Browse and navigate to the CDROM drive containing the CD Select Setup exe and click on Open Click on OK A setup wizard for version 4 1 of the C47B Maintenance Terminal data files will open As directed close all other programs that are running Click on Next A window identifying the default destination folder for the data files will be displayed Click on Next A window indicating that the data files are ready to install will be displayed Click on Install A window indicating that the installation is completed will be displayed Click on Finish Remove the Maintenance Terminal Data file CD for the Bell 407 from the CDRO
21. he Triumph Engine Control Systems TECS Service Bulletin 73 10 4 With a plastic scraper remove and discard the existing FADEC software version decal located on the instrument panel Wipe the surface clean with a clean damp cloth moistened with aliphatic naphtha C 305 Figure 1 5 Install applicable decal on the instrument panel in the location identified 6 Seal the edges of the decal with edge sealer C 349 7 Insert temporary revisions into the appropriate Rotorcraft Flight Manual RFM a Insert Temporary Revision 14 into the BHT 407 FM 1 Flight Manual 407 b Insert Temporary Revision 4 into the BHT 407 FM 2 Flight Manual 407GX 8 Make an entry in the helicopter logbook and historical service records indicating compliance with this Technical Bulletin TB 407 14 111 Page 4 of 6 Export Classification C ECCN EAR99 Approved for public release a ea IIc e CIC e SEE DETAIL B FOR S N 54300 AND SUBSEQUENT 14531_001a Figure 1 Markings Installation Sheet 1 of 2 TB 407 14 111 Page 5 of 6 Export Classification C ECCN EAR99 Approved for public release 3 35 IN 85 1mm 0 06 IN 1 5 mm 0 19 IN FADEC SOFTWARE VERSION 5 400 4 8 mm WITH DIRECT REVERSION TO 0 80 IN MANUAL INSTALLED REFER TO 20 3 mm FLIGHT MANUAL FOR OPERATION DETAIL A DECAL P N 407 075 011 115 FOR S N 53000 THROUGH 54299 4 09 IN 103 9 mm i t FADEC SOFTWARE VERSION 5 400 WITH DIRECT REVERS
22. in the brackets to the right of the associated parameter on the record data sheet Appendix A paragraph 1 D 12 Complete steps 13 through 19 below for original ECU configuration 115220 1A5 20 only 13 Record values for the Np strike data values on the record data sheet Appendix A paragraphs 1 D 11 through 14 14 Verify the following Np strike data values in the engine history data a NoLmEvts 0 b NoRLmEvts 0 c NoMLmEvts 0 d NpExclnd FALSE 15 If the engine log card contains Np strike data or if the Np exceedance data recorded by the ECU meets criteria for recording strike data the Np strike data in the ECU memory should be edited to reflect actual strike status Refer to the 250 C47B engine O amp M manual for determining strike status from Np exceedance information Update the recorded value on the record data sheet Appendix A paragraph 1 D 11 16 To edit the Np strike data in the ECU memory from the MTerm main menu click on Engine History gt Edit A Parameter Edit window will be displayed 17 Click on NpLmEvts and Click on Edit 18 Edit the value for the parameter and click on OK The data will be written to the ECU 19 When prompted cycle the power switch on the interface box to OFF for a couple of seconds then back to PWR ON Click OK 20 Disconnect the MTerm from the ECU by clicking on the disconnect icon at the top left of the window 21 Exit the MTerm by
23. ions will cause numerous faults to be logged in RAM volatile memory due to loss of external signals Observed faults should be disregarded except as specifically addressed in these instructions 4 Steps 2 A through 2 E can be completed in advance while away from the aircraft Steps 2 F through 2 L will require access to the aircraft and are required to be completed in consecutive order as written 5 It is recommended that programming of the ECU be completed with a PC that is running off AC power rather than battery power to ensure that the PC does not shut down in the middle of the reprogramming process 6 It is recommended that if a PC that has been historically used to run the Maintenance Terminal software is available it also be used to support reprogramming of the ECU since the serial communications port has already been set up and demonstrated to be functional 7 Ifa PC with Maintenance Terminal version 2 00 or 2 01 is not available complete the registration of the CD for Maintenance Terminal 2013 version 2 3 in order to receive an installation password A registration form and instructions can be found in the Maintenance Terminal User s Manual 8 If programming of the Primary governor or Reversionary governor is unsuccessful for any reason it is recommended that the PC be re booted the ECU be de powered and the programming process be restarted from the first step of the applicable paragraph 2 H for the Primary govern
24. iting ECU Software to flash memory please wait 12 A file transfer status box will then be displayed showing the progress of the software file transfer from the PC to the Reversionary governor flash memory as shown below Tera Term Send file Filename Bea Fullpath CAEMC3S5 TITOLLKECUFiles 661 Bytes transfered 45124 19 9 Elapsed time 0 45 983Bytess WARNING DO NOT CLICK ON CLOSE PAUSE OR HELP DURING THE PROGRAMMING PROCESS OR THE UPLOAD WILL TERMINATE NOTE It will take approximately 5 minutes to program the Reversionary governor It is recommended to move the mouse every 2 3 minutes to prevent the PC from going to sleep during the programming process which could terminate the upload and lock up the serial port 13 When programming the Reversionary governor is complete the transfer status box will close and a message box will be displayed as shown below EE EMC 35 ECU TTOLLI This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 18 of 27 Rolls Royce Proprietary Document Nu Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 14 Click on OK The TTOLLI will then read back the uploaded version of software from the ECU and display it as shown below Record confirmation of the Reversionary governor software version on the record data sheet Appendix A paragraph 1 F 1 EE EMC 35 ECU T
25. m the software version to be loaded into the Reversionary governor existing version may be C 00681 9026 or C 00681 9029 EE EMC 35 ECU TTOLLI Are you sure you want to re program the ECU from the existing version to the upgrade version listed below Existing Reversionary Channel ECU Software Version C 006861 9029 Upgrade Reversionary Channel ECU Software Version C 00661 9100 9 Click on Yes The TTOLLI will upload a flash kernel to Reversionary governor RAM memory as shown below Tera Term Send file Filename Siae ET Fullpath AECUFiles C 860 0003 oll Bytes transfered 10155 18 6 Elapsed time 0 09 10666ytes s WARNING DO NOT CLICK ON CLOSE PAUSE OR HELP DURING THE PROGRAMMING PROCESS OR THE UPLOAD WILL TERMINATE 10 It will take approximately 1 minute to upload the flash kernel to the Reversionary governor Once the flash kernel is uploaded it will start execution and erase the flash memory EMC 35 ECU TTOLLI Erasing ECU Software flash memory please wait a minute or two This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 17 of 27 Rolls Royce Proprietary Document Nu l Triumph Engine Control Systems A Tiumoh Group Company EMC 35R ECU 73 10 SERVICE BULLETIN 11 After the Reversionary governor flash memory is erased the TTOLLI will begin to program the flash memory with version 681 9100 EMC 35 ECU TTOLLI Wr
26. o ECU software version 257 5356 does not apply to ECU software version 257 5356 27 Disconnect the MTerm from the ECU by clicking on the disconnect icon at the top left of the window 28 Exit the MTerm by clicking on File gt Exit 29 If previous steps were performed with ECU on aircraft complete steps 30 through 32 Otherwise set the power switch position on the programming interface box to OFF 30 Remove aircraft power from ECU 31 Disconnect Maintenance Terminal cable from the FADEC ECU communications port and from the 9 pin COM port on PC or USB to serial adapter 32 Replace dust cap on the FADEC ECU communications port G Connect Programming Equipment 1 Using a small Phillips screwdriver remove the four screws securing the identification plate to the ECU housing Retain screws and identification plate for transfer of information onto new identification plate in accordance with step 2 L 2 Complete steps 3 through 15 only if programming equipment was not previously connected in paragraph 2 F 3 Ensure aircraft power is removed from ECU This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 10 of 27 Rolls Royce Proprietary Document Triumph Engine Control Systems DE A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 Remove cable clamp closest to ECU J2 connector Disconnect airframe harness from
27. or 2 1 for the Reversionary governor 9 Ensure that a replacement ECU identification plate is available before proceeding past Step 2 F of this bulletin A Install Maintenance Terminal Software NOTES It is not necessary to re install the Maintenance Terminal software from the CD each time this service bulletin is accomplished It is also not necessary to install the Maintenance Terminal 2013 software version 2 3 if an earlier version v2 0 v2 01 has been previously installed onto the PC Refer to Maintenance Terminal User s Manual if any difficulties with the installation are encountered The user must have administrator rights on the PC in order to install the software This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 5 of 27 Rolls Royce Proprietary Document ac Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 2 3 4 5 6 7 8 9 10 SERVICE BULLETIN Insert the Maintenance Terminal 2013 CD CD118794 1 into CDROM drive From the Windows toolbar click on Start gt Run Click on Browse and navigate to the CDROM drive containing the CD Select Setup exe and click on Open Click on OK A window titled Setup for Maintenance Terminal Version 2 3 will be displayed As directed close all other programs that are running Click on Next A window identifying the default d
28. osition on the programming interface box to PWR ON From the Windows toolbar click on Start gt Programs gt Maintenance Terminal gt Maintenance Terminal If prompted for a password enter the supplied password and click OK Initiate Maintenance Terminal communications with the ECU by clicking on the connect icon at top left of MTerm window Verify the following information from the Component Serial Numbers screen Record compliance on record data sheet Appendix A paragraph 1 B a ECU Software Version 257 5400 and Supplemental ID E844 Verify that the component serial numbers are identical to those recorded in step 2 F 23 prior to reprogramming the Primary governor software If identical place a check mark in the brackets to the right of the associated component serial number on the record data sheet Appendix A paragraph 1 C Click on OK On toolbar at top of the MTerm window click on Engine History gt View A Parameter Edit window will be displayed This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 20 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Tiumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 11 Verify that the values for the displayed engine history data are identical to those recorded in step 2 F 26 prior to reprogramming the Primary governor software If identical place a check mark
29. s Royce Proprietary Document SS Y Triumph Engine Control Systems A Triumph Group Company 73 10 SERVICE BULLETIN I Weight and Balance None J Electrical Load Data Not Changed K Software Accomplishment Summar The software accomplishment summary for software versions 257 5400 and 681 9100 is Triumph document C 1105 24 latest revision L References None M Other Publications Affected Not Applicable This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 4 of 27 Rolls Royce Proprietary Document SS SO Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 2 Accomplishment Instructions Precautions 1 To ensure software integrity the Triumph supplied CDs are write protected If there is any damage to the CDs or any question of CD integrity consult Triumph for replacement CDs before attempting accomplishment instructions 2 The operator should verify that the PC is free of virus infection using a commercially available anti virus program with recently updated virus detection files The protocol and automated checks of the on line loader function prevent the possibility of infecting software in the ECU However it is possible for virus infection to cause operating problems with the PC which could inhibit completion of the accomplishment instructions 3 Powering the ECU without normal airframe connect
30. s page to Triumph Engine Control Systems via one of the following methods Regular mail Mail to Triumph Engine Control Systems Attn Brian Beal 1 Charter Oak Boulevard P O Box 330651 West Hartford CT 06133 0651 Fax Fax to 860 231 2706 E mail Scan and e mail to TECSWH Support triumphgroup com This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 27 of 27 Rolls Royce Proprietary Document
31. sert the Bell 407 250 C47B FOSSA CD CD118743 1 into the CDROM drive Browse to the CDROM drive Browse to folder IMAGE_CD118743 1_REV Keyspan USB Files Depending upon the PC operating system double click on the appropriate setup file as defined below a USA 19HS Windows 98 ME v3 4 exe bo USA 19HS Windows 2000 XP 2003 Server Vista _v3 75 exe c USA 19S Windows 7v4 exe also use for Windows 8 Follow setup screens to complete installation of necessary files for the USB to serial adapter Keyspan manuals are on the CD if needed Plug the USB to Serial adapter into a USB port on the PC The driver file will be installed automatically Remove the Bell 407 250 C47B FOSSA CD from the CDROM drive This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 7 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN E Determine Serial COM Port Assignment NOTE The serial COM port assignment only has to be determined if the PC did not have Maintenance Terminal software installed prior to initiating this service bulletin 1 From the Windows toolbar menu click on Start gt Control Panel gt System gt Device Manager gt Ports COM amp LPT 2 If PC has a 9 pin serial port connector note the COM port assignment typically COM1 3 If USB to serial adapter is being used no
32. sheet Appendix A paragraph G 2 All other identification plate information remains unchanged If necessary other service bulletin information shall be transferred from the old identification plate to the new identification plate prior to installation using a marking method such as hand scribing vibro etching or metal stamping M Record Compliance with Service Bulletin After the new identification plate has been installed record compliance information as specified on Service Bulletin Compliance Data Sheet Appendix B Remit to Triumph Engine Control Systems via mail fax or email as specified on the form This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 22 of 27 Rolls Royce Proprietary Document SS SO Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 ELECTRONIC CONTROL UNIT MODEL NO EMC 3a5R SERIAL HO Figure 1 ECU Identification Plate Replacement tem Number Quantity Part Number Plate Identification 113417 1 Screw Self Tapping MS51861 1C This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 23 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN 3 Material Information The basis for the following is per the Electronic Control Unit a
33. ssage box will be displayed to confirm the software version to be loaded into the Primary governor existing version may be C 00257 5356 or C 00257 5358 EE EMC 35 ECU TTOLLI Are you sure you want to re program the ECU from the existing version to the upgrade version listed below Existing Primary Channel ECU Software Version C 0025 7 5358 Upgrade Primary Channel ECU Software Version C 0025 5400 16 Click on Yes The TTOLLI will begin erasing the Primary governor flash memory as shown below EMC 35 ECU TTOLLI Erasing ECU Software flash memory please wait a minute or two 17 Once the Primary governor flash memory is erased the TTOLLI will begin to program the flash memory with version 257 5400 as shown below EMC 359 ECU TTOLLI Writing ECU Software to flash memory please wait 18 A file transfer status box will then be displayed showing the progress of the software file transfer from the PC to the ECU as shown below Tera Term Send file Filename PATE TR Fullpath CAEMC35 TTOLLKECUFiles 25 Bytes transfered 64 0 2 675 Elapsed time 0 07 857 Bytesis This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 14 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company SERVICE BULLETIN 73 10 WARNING DO NOT CLICK ON CLOSE PAUSE OR HELP DURING THE PROGRAMMING PROCESS OR THE UPLOAD WILL
34. ssembly Instructions ae Destroy and 113417 1 Plate Identification ECU 113417 1 MS51861 1C Screw Self tapping MS51861 1C 115220 1A5 24 115220 1A5 20 RT M250 10695 Electronic Control Unit 23080490 Re identify 115220 1A5 24 115220 1A5 23 anti M250 10695 Electronic Control Unit 23088484 Re identify 115220 2A5 24 115220 2A5 23 anti M250 10696 Electronic Control Unit 23088856 Re identify This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 24 of 27 Rolls Royce Proprietary Document SS SO Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU SERVICE BULLETIN 73 10 APPENDIX A SERVICE BULLETIN RECORD SHEET 1 Record and Verify Data Extracted from ECU A As instructed in step 2 F 22 place check mark in brackets after verifying the following information from the prior to reprogramming the ECU 1 ECU Software Version 257 5356 with supp ID 6058 OR 2 ECU Software Version 257 5358 with supp ID 211A As instructed in step 2 J 7 place check mark in brackets after verifying the following information from the after reprogramming the ECU 1 ECU Software Version 257 5400 with supp ID E844 _ As instructed in step 2 F 23 record the following S N information below prior to reprogramming the Primary governor Place check mark in brackets after verifying S N data is identical after reprogramming the ECU as in
35. structed in step 2 J 8 ECU SIN Engine S N Compressor S N 4 HMU SIN Aircraft ID Turbine S N 7 Eng Gearbox S N As instructed in step 2 F 26 record the following engine history data below prior to reprogramming the Primary governor Place check mark in brackets after verifying engine history data is identical after reprogramming the ECU as instructed in step 2 J 11 For original ECU configuration 115220 1A5 20 record values for items k through n Items 11 14 below after reprogramming the ECU as instructed in step 2 J 13 1 ECURnTm Hours 2 NoRLmPk Np 3 NoRLmTm Seconds 4 NumSirt Starts 5 OSCyc Boolean O 6 SgCtr Surges 7 EngRunCtr Seconds This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 25 of 27 Rolls Royce Proprietary Document _ S Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN 8 NpLmPk Np 9 NoLmTm Seconds O 10 OSCtr Events 11 NpLmEvts Counts O 12 NoRLmEvts Counts 13 NoMLmEvts Counts O 14 NpExclnd Boolean E As instructed in steps 2 H 20 and 2 H 21 place a check mark in the brackets after verifying the following information from the after reprogramming of the Primary governor 1 ECU Software Version 257 5400 2 ECU Supplemental ID E844 F As instructed in step
36. te the COM port assignment for the adapter NOTE The Maintenance Terminal software only supports COM port assignment up to and including COMS If the COM port assignment is higher than COM9 refer to the Keyspan manual on the Bell 407 250 C47B FOSSA CD CD118743 1 for instructions on how to change the COM port assignment F Record Software Version Serial Number and Engine History Data Prior to Re programming ECU NOTE _ If it is not possible to provide AC power at the aircraft location the ECU may be removed from the aircraft for reprogramming 1 If ECU is to be programmed on aircraft complete steps 2 through 5 below Otherwise begin at step 6 below 2 Remove dust cap from FADEC ECU communications port on left side of pedestal 3 Connect one end of the Maintenance Terminal interface cable to FADEC ECU communications port and the other end to the 9 pin COM port on PC or USB to serial adapter Apply airframe power to the ECU Go to step 17 below Plug the circular plug on the programming interface cable into the J2 connector on ECU Plug the 15 pin D connector on the programming interface cable labeled as P104 into the J104 connector on the programming interface box 8 Set the programming switch on the programming interface box to center OFF ECUIC position 9 Set the power switch position on the programming interface box to OFF 0 Connect AC power cord to power supply module j
37. ters to be 12 points Helvetica Regular Text for the decal is detailed in Figure 1 4 The decal may be locally manufactured using lettering of white color No 17875 on a black background color No 17038 per FED STD595 Characters to be 10 points Spartan Black Text for the decal is detailed in Figure 1 5 The required material will be supplied by Triumph Engine Control Systems TECS as part of the software upgrade campaign TB 407 14 111 Page 2 of 6 Export Classification C ECCN EAR99 Approved for public release Consumable Material The following material is required to accomplish this bulletin but may not require ordering depending on the operator s consumable material stock levels This material may be obtained through your Bell Helicopter Textron Supply Center Part Number Nomenclature Qty Reference 2110 00010 00 NAPTHA MB1041 TT N As required C 305 95 TYII 1GAL 2010 06640 00 COMPOUND SEALER As required C 349 3950 SCOTCHCAL C XXX numbers refer to the consumables list in BHT ALL SPM Standard Practices Manual SPECIAL TOOLS Refer to the required Tooling section per the Triumph Engine Control Systems TECS service Bulletin 73 10 This will be supplied as part of the software upgrade program WEIGHT AND BALANCE Not affected ELECTRICAL LOAD DATA Not affected REFERENCES BHT 407 IPB Illustrated Parts Breakdown Chapters 11 76 95 and 96 BHT 407 MM Maintenance Manual Chapters 11 71 76 95 and 96 Bell
38. wall connector refer to Rolls Royce CEB A 73 6059 Description This service bulletin provides instructions for changing the embedded software for the Primary governor from version 257 5356 or 257 5358 to 257 5400 and the embedded software for the Reversionary governor from version 681 9026 or 681 9029 to 681 9100 using the on line loader functionality of the ECU The task is accomplished using an IBM compatible personal computer PC with Windows XP 7 or 8 operating system and the following Triumph supplied hardware software 1 Programming interface cable Programming interface box On Line Loader interface software Maintenance Terminal software Bell 407 Maintenance Terminal data files 6 Embedded software files for versions 257 5400 and 681 9100 The on line loader OLL function which is run on the personal computer will completely erase the existing embedded Primary governor and Reversionary software and upload the new software version to replace it The on line loader function automatically verifies successful erasure of the existing software and automatically verifies the integrity of the new These commodities technology or software are controlled by the U S Export Administration Regulations EAR Diversion contrary to U S law is prohibited ECCN 9E991 May 29 14 M250 C47B Page 1 of 27 Rolls Royce Proprietary Document Y Triumph Engine Control Systems A Triumph Group Company EMC 35R ECU 73 10 SERVICE BULLETIN
39. y using the communications port and close those applications and then restart the TTOLLI application and try to connect again NOTE An aborted TTOLLI application can in some cases leave the serial port locked Consult the TTOLLI users manual C 1913 001 on CD118743 1for directions on unlocking the serial port 10 Upon a successful connection with the serial port the following menu dialogue box is displayed EMC 35 ECU TTOLLI Program Reversionary Read Version Primary Read Version Reversionary Cancel Triumph Engine Control Systems support Brian Beal Email bcbeal triumphgroup com 1 660 794 9833 Tera Term On Line Loader Interface TTOLLI Version C 1906 0001 11 Click on Program Primary and click on OK 12 The TTOLLI will then display the current Primary governor software version as shown below may be C 00257 5356 or C 00257 5358 EE EMC 35 ECU TTOLLI 13 Click OK The following status box will be displayed EMC 35 ECU TTOLLI 4 software file must be selected to load into the ECU Primary Channel This document is subject to the controls and restrictions as stated on the title page May 29 14 M250 C47B Page 13 of 27 Rolls Royce Proprietary Document Nu Triumph Engine Control Systems A Tiumoh Group Company EMC 35R ECU 73 10 SERVICE BULLETIN 14 An explorer window will open Browse to C temp Bell 407 EMC 35 Program Files and click on 257 5400 oll and then click on Open 15 A me
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