MT Propeller
Contents
1. 3 DRAIN FROM ENGINE OIL SYSTEM Fig 6 Schematic diagram of governor operation Normal operation 1 Gear oil pump 7 Speed adjusting lever 2 Engine oil supply 8 Speeder spring 3 Drain line to sump 9 Flyweights 4 Control line for propeller servo 10 Pilot valve 5 Reversing valve 11 Relief valve 6 Solenoid valve Issue 1 Page 12 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 3 4 Reversing sales mt propeller com Refer to page 14 Via an electric signal to the solenoid beta valve the switching control valve changes the position the reversing valve moves to reversing position and thus relief valve changes its setting to high pressure At the same time control line for propeller servo will be connected with governor high pressure line and pushes the propeller into full reverse In this condition the pilot valve is inoperative therefore the propeller is not controllable by the constant speed section in the governor The negative thrust must be produced by increasing and decreasing the engine power engine rpm Issue 1 Page 13 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com AN L 4 E MAXIMUM RPM 12 24 V DC FEATHER a IK FUNCTIONAL VIEW TO GEAR PUNP ES SW N DRAIN2. 934 85 AS Fig 5 Governor flange ADN 20010 Designation of channels Oil supply from the engine oil system l Propeller oil supply III Return oil from the propeller hub and from the internal leakage of the governor into the engine oil system Issue 1 Page 10 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 3 0 OPERATION sales mt propeller com 3 1 Normal operation on speed Refer to page 12 If the governor is in on speed condition the actual speed and selected speed are equal force of the speeder spring is balanced with force of the rotating flyweights The pilot valve plunger covers ports so oil cannot flow to or drain from the propeller servo piston Oil from the gear pump overcomes relief valve spring force and is circulated through the open relief valve plunger back to the inlet side of the pump 3 2 Overspeed This condition occurs when actual propeller speed is greater than selected The flyweights pivot outward and they overcome the force exerted by the speeder spring Flyweight toes lift the pilot valve plunger uncovering ports in the shaft allowing oil in servo to drain from the propeller servo piston The propeller servo piston increases pitch engine load is increased and propeller speed is reduced until selected speed is obtained The flyweights return to a normal position and the pilot valve plunger covers ports i
3. 49 0 9429 8432 sales mt propeller com SHIPPING AND STORAGE For any shipment of the governor use original container or box In case of returning the governor it is furthermore recommended to return all accessories and parts together with the governor They will also be inspected and not considered to be missing If the governor is stored for a longer period of time preferably use the original container or an equivalent one Storage only in a controlled environment temperature 5 F to 95 F rel humidity 10 to 75 Avoid extreme temperature humidity differences or cycles All metal surfaces should have anti corrosion protection which is easy to remove Long term storage could require additional preservation All standard anti corrosive preservation oils may be used if they do not affect the seals If the governor is stored or transported in corrosive environment such as salt water or fog it is recommendable to cover the visible outside surfaces of the metal parts with a thin film of light engine oil Before reuse of the governor clean it inside with engine oil Pour oil in governor through channels Il and Ill see fig 5 Then turn governor drive in direction marked on one side of the base Then leave oil to flow out from the governor MAINTENANCE There is no maintenance required except for the procedures described in this manual In case of necessity please contact service center or governor manufacturer Issue 1
4. KS SSS MG SS XN NSS Seel L Lilie a E rm EELER gg NN ELA LEY Lig aT TI L EET 72 TO ENGINE OIL SYSTEM Tu ENGINE TO PROPELLER SERVO a FROM ENGINE OIL SYSTEM DRAIN Fig 7 Schematic diagram of governor operation Reversing operation 1 Gear oil pump 7 Speed adjusting lever 2 Engine oil supply 8 Speeder spring 3 Drain line to sump 9 Flyweights 4 Control line for propeller servo 10 Pilot valve 5 Reversing valve 11 Relief valve 6 Solenoid valve Issue 1 Page 14 2004 04 01 ATA 61 20 46 mi propeller 4 2 4 2 1 4 2 2 4 2 3 4 2 4 4 2 5 4 2 6 4 2 7 4 2 8 4 2 9 4 2 10 4 2 11 Page 15 GOVERNOR SPECIFICATION Basic Parameters Weight Dimensions Drive Governor rotation facing base Propeller speed control Governor drive ratio Operating liquid Operating voltage Technical Data Supply oil pressure High pressure relief valve setting at90 of max governor rpm oil temperature 75 3 C 170 F Low pressure relief valve setting at max governor rpm oil temperature 75 3 C 170 F Range of operating temperatures for full accuracy Full range of operating temperatures Pump capacity at 1 750 10 governor rpm 3 0 3bar 43 5 psi input oil pressure 75 3 C 170 F oil temperature oil pressure at output approx 10 0 5 bar 145 7psi Range
5. drop etc and for damaged parts In case you have found a damage caused by transportation please contact the forwarder immediately as well as the supplier 6 0 INSTALLATION INSTRUCTION 6 1 Clean engine and governor flange with solvent or gasoline Both surfaces must be dry and clean Remove all surface defects 6 2 Install clean silicone greased gasket on engine flange Gasket must have a screen on the inlet supply parts Turn governor drive by hand to check free turning Install the governor on the engine flange The splines of the governor shaft must fit into the splines of drive in the engine Mounting bolts or stop nuts with washers should be torqued crosswise with 20 24 Nm 180 220 inlb Warning Loosen bolts or nuts can cause improper function of the governor or at least oil leakage 6 3 Connect control rod to governor control lever according to the instruction in the aircraft service manual 6 4 Plug in wiring for the reverse switching beta valve 6 5 Perform a functional check and inspection for leakage according to chapter 11 in this manual Issue 2 Page 16 2004 09 13 ATA 61 20 46 A mi propeller 2 m Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com 7 0 CONTROL HEAD LEVER ADJUSTMENT It is possible to position the governor head control lever to any position see fig 8 7 1 Governor head control lever rearrangement instru
6. 8432 sales mt propeller com Fig 9 Maximum rpm setting adjustment Issue 1 Page 20 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com EH N ri See ht IS SSS d A Z um XA ee ee a WAP a LXX SA Re E UU UU ri LEE DIV E P LI a a eee Ee CAN 7 EN Ee Weiner I N PA TATTA A IN 10 Le Lie Au 3 Fig 11 Relief valve adjustment For fig 10 and 11 1 Safety pin 8 Guide 2 Plug 9 Reversing valve 3 Governor base 10 Bushing 4 Adjusting shim 11 Idler 5 Spring 12 Pin D Governor body 7 Plunger Issue 1 Page 21 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com 10 0 ADJUSTMENT OF RELIEF VALVE Fig 10 and Fig 11 10 1 Remove safety pin 1 from relief valve plug 2 apply adequate force onto the plug to release the safety pin 10 2 Remove the plug 1 from the idler pin 12 Check the number of shims under the plug Note Do not lose shim s during removing 10 3 Adjust relief valve pressure by changing thickness of the adjusting shims 4 Note 0 1 mm of total length of the shim set is about 10 psi Discard one shim is about 50 psi pressure reduction 10 4 Insert the set of the adjusting shims into the idler pin Inst
7. 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com
8. 49 0 9429 8432 sales mt propeller com 11 2 a If the propeller RPM is exceeding the redline limit reduce it to the redline using propeller control Leaving propeller at this redline RPM setting land aircraft and shutdown Remover cowling and note position of control arm and governor Adjust governor high RPM screw clockwise so it just touches stop on governor control arm this will ensure that the correct arm position for governor redline RPM setting cannot be exceeded 11 2 b If the propeller is bellow red line limit with max RPM setting on the propeller cockpit control note RPM and land Remove engine cowling and adjust the governor high RPM screw 1 turn counterclockwise will result in approximately 25 RPM higher Perform another flight to confirm adjustment were sufficient Remove engine cowling and check for the oil leaks Oil leaks aren t permitted Make a record in governor installation record 11 3 GENERAL Static Run Up There has been some confusion in the field concerning propeller low blade angle setting the governor setting and how it relates to static run up and take off RPM As a general rule engine redline RPM cannot be reached during a full power static run up Contrary to popular belief the governor is not controlling the propeller at this time the propeller is against its low pitch stop Attempting to increase propeller static run up RPM by adjusting the governor high RPM screw will have no effect and will probably r
9. Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Fig 2 P 9 Propeller Governor side view 1 Solenoid valve 2 Speed adjusting lever Issue 1 Page 7 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Fig 3 P 9 Propeller Governor dimensions Issue 1 Page 8 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com pe 15 14 S He El ER nz KE b Dam ZE b Eas ui KEE a EELER dE RATES FE are C7 a St LES UN SSL A ie ni 3 E e mE X A X We WIL 177 TIS WY Al oe 4 FA dne rg HEN 6 5 iL 3 Fig 4 P 9 Propeller Governor longitudinal sectional view 1 Speed adjusting lever 9 Gear pump 2 Return spring 10 Governor base 3 Speed adjusting shaft 11 Pilot valve 4 Speeder spring 12 Governor drive 5 Head with flyweights 13 Pressure changing valve 6 Shaft 14 Switching valve 7 Relief valve plunger 15 Solenoid 8 Governor body 16 Contacts Issue 1 Page 9 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com
10. all the relief valve plug and secure with safety pin Note This procedure sets both pressures for normal operation and for reverse at the same time Reverse high pressures cannot be adjusted separately 11 0 AIRCRAFT FLIGHT CHECK Before Static Run up check feathering on feathering governors in accordance with aircraft service instructions or pilot manual 11 1 PERFORM STATIC RUN UP ATTENTION PERFORM THE STATIC RUN UP ON A CLEAN AREA TO NOT DAMAGE THE PROPELLER BLADES DUE TO STONES ETC Lock aircraft brakes Place cockpit propeller RPM lever in high position Advance throttle slowly to maximum permitted engine manifold pressure limits Record propeller RPM If local wind conditions are over 2 5 m s 5 knots repeat check with aircraft pointed to opposite direction and average two numbers As a general rule propeller should be 25 100 RPM blow the red line limit during check PULL BACK THE PROPELLER LEVER 3 TO 5 TIMES TO BLEED THE SYSTEM TO REMOVE THE AIR 11 2 PERFORM FLIGHT TEST During takeoff acceleration record maximum propeller RPM When sufficient altitude is reached level out aircraft leaving propeller control in full RPM position Maintain this setting for 3 to 5 minutes while monitoring propeller RPM Following this check two conditions may exist which require adjustment Issue 3 Page 22 2005 04 20 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax
11. cessive play in the linkage between the governor and the cockpit control often leads to erratic operation Specifically if the propeller RPM is suddenly changing and holding a new setting on its own this could indicate loose linkage Solution Trace linkage and locate unsecured sections and tighten up as needed Please note that although linkage may appear to allow full governor control while the engine is off it may not in the air Engine vibration and stretch of the mount during operation can often aggravate the condition Therefore it is important the entire length of linkage be properly secured even if both ends alone are tight EXCESSIVE PROPELLER FRICTION NOTE This is rarely the cause of RPM malfunction Propeller may be overly resistant to pitch movement This can be caused by either excessively tight shimming of the propeller blades or internal corrosion or part failure causing binding Solution Check amount of blade play as defined below A total lack of blade shake may indicate excessively tight blade shims If this is suspected have the propeller checked by a qualified FAA approved propeller repairman Note that this check and any needed correction can usually be performed with the propeller installed on the aircraft Issue 1 2004 04 01 ATA 61 20 46 mi propeller 16 0 16 1 16 2 16 3 16 4 16 5 Page 26 Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax
12. ctions 7 1 1 Remove one safety wires from six screws position 1 fig 8 7 1 2 Loosen these six screws such a way that it is possible to turn with the control head 7 1 3 Turn the control head to desired position 7 1 4 Tighten the six screws secure with lock wire AMS5687 or equivalent according to fig 8 Issue 1 Page 17 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Fig 8 Positioning of governor P 9 control head Issue 1 Page 18 2004 04 01 ATA 61 20 46 mi propeller 8 0 9 0 9 1 9 2 9 3 Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Intentionally left blank ADJUSTING OF MAXIMAL PROPELLER RPM Note It is possible to set maximum rpm with the described procedure only in a limited range This is a normal maintenance procedure and fully authorized Remove lock wire from the stop screw fig 9 pos 1 and loosen the lock nut 2 of the screw 1 Place the governor lever on maximum rpm stop Change maximum speed stop screw until proper speed setting is reached Torque check nut Secure the lever with lock washer and screw 4 5 Nm 35 44 inlb Issue 1 Page 19 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429
13. eller 1 0 2 0 Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com P 9 SERIES HYDRAULIC PROPELLER GOVERNOR INSTALLATION AND OPERATION MANUAL GENERAL The P 9 hydraulic propeller governor is a single acting governor developed for hydraulically variable pitch propellers with reverse and feathering produced by AVIA Propeller for MT Propeller Straubing See fig 1 fig 1 1 DESIGNATION P 9 C MO a b a 7 Drawing No b Application No Engine Aircraft combination S No 04 G 003 a b a Year of Manufacture G governor b consecutive No DESIGN INFORMATION Also refer to fig 2 3 4 and 5 The governor is a dual pressure single acting system It is designed for oil pressure to decrease pitch The governor has one relief valve with pressure settings The low pressure setting is for normal operation and the high pressure relief valve setting is for reverse beta range In low pressure operation the necessary increase of the engine oil pressure is assured by a gear pump in the governor which increases the oil servo pressure Flyweights and a speeder spring move a pilot valve allowing servo oil to flow to or from the piston in the propeller In on condition there is no oil flow A speed adjusting lever changes the pre load of the speeder spring This results in an engine propeller speed change The high pressure mode is activated v
14. esult in a propeller overspeed during the take off roll Issue 1 Page 23 2004 04 01 ATA 61 20 46 mi propeller 12 0 12 1 12 2 14 0 14 1 14 2 14 3 14 4 Page 24 Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com GOVERNOR FLANGE GASKET CHANGE Remove governor from engine chapter 13 Install the governor with a new gasket to the engine Surfaces must be clean and smooth See chapter 5 REMOVING THE GOVERNOR FROM ENGINE Disconnect the control rod refer to engine aircraft service manual Disconnect cable from the solenoid Put shipping cap if applicable on the solenoid If applicable remove safety wire from flange nuts Remove nuts and washers Remove the governor from the engine Protect the engine flange by appropriate means Secure governor flange with shipping cap In case of necessity clean the governor with cleaning cloth using petrol Pay attention that no petrol can enter the governor Put the governor into an appropriate box store it as mentioned in chapter 16 GOVERNOR CONSERVATION Clean the governor with a soft brush or an appropriate cloth with petrol Note Pay attention that no petrol can enter the governor Cover all non varnished areas on the governor with a thin film of light engine oil Treat the governor according the instruction in item 13 and store it according to chapter 16 If the governor is conserved and moun
15. ia a magnetic beta valve which is installed on the governor In this condition the pressure rises up approx twice and pushes the blades into full reverse During high pressure mode the propeller rpm is not controlled by the governor because the constant speed section is cut out The negative thrust is set by increasing and decreasing the engine power rpm After the electric signal is switched off the governor returns into normal operation pressure mode for constant speed operation The governor contains a gear pump a relief valve a pilot valve flyweights the beta valve and a solenoid valve The flange type of the governor is in accordance with ADN 20010 standard refer also to fig 5 The solenoid valve is installed on the top of the governor The solenoid valve controls the beta valve which changes from low pressure to high pressure mode via an electric signal which is produced by a switch inside the cockpit If the high pressure mode is selected the pilot valve is inoperative The control lever is installed on the head of the governor its angular position can be changed by turning the cover assembly Issue 1 Page 5 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Fig 1 P 9 Propeller Governor General View Issue 1 Page 6 2004 04 01 ATA 61 20 46 mi propeller Flugplatz
16. mi propeller ATA 61 20 46 E 1046 OPERATION AND INSTALLATION MANUAL HYDRAULIC REVERSIBLE PROPELLER GOVERNOR P 9 series 41oduip LBA approved EASA 21J 020 ATA 61 20 46 mi propeller TABLE OF CONTENTS Table of Contents List of Figures List of Revisions List of Effective Pages 1 2 10 11 12 13 14 15 16 17 Page 1 General Design Information Operation Information Governor Specification Basic Parameters and Technical Data Governor Inspection Installation Instruction Adjustment of Control Head Intentionally left blank Adjustment of Maximal Propeller RPM Adjustment of Relief Valve Aircraft Flight Check Governor Flange Gasket Change Removing the Governor from Engine Governor Conservation Troubleshooting Shipping and Storage Maintenance A Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Page 11 15 16 16 17 19 19 22 22 24 24 24 25 26 26 Issue 1 2004 04 01 ATA 61 20 46 Ak mi propeller ee Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com LIST OF FIGURES Page Fig 1 P 9 Propeller Governor general view 6 Fig 2 P 9 Propeller Governor side view 7 Fig 3 P 9 Propeller Governor dimensions 8 Fig 4 P 9 Propeller Governor longitudinal sectio
17. n the shaft blocking the flow of oil to or from the propeller servo piston The governor is back in on speed condition 3 3 Underspeed This condition occurs when actual propeller speed is less than selected speed A decrease in centrifugal force causes the rotating flyweights to pivot inward under force exerted by the speeder spring The pilot valve plunger is forced down uncovering ports in the shaft allowing pressurized oil to flow to the propeller servo piston The propeller servo piston decreases pitch thus reducing load on the engine and increasing propeller speed until selected speed is obtained The flyweights return to a normal position and the pilot valve plunger covers ports in the shaft blocking the flow of high pressure oil to or from the propeller servo piston The gover nor is back in on speed condition Overspeed On speed Underspeed Issue 1 Page 11 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com FUNCTICNAL VIEW TO GEAR PUMP MS NEY GCF W XN XN FEATHER 9 Seo ded S ipsi CH o ES al E C in N an LLL LLLA C Kn GE ECH VE EDO LIRE T war ER 2 Vu III IT IN WE 5 BRSHARHRBNR Dau HEH Ca mm pum PLZZ LE f RZ LE ca Kaze E TOENGINE OIL SYSTEM TO PROPELLER SERVO
18. nal view 9 Fig 5 View at Governor Flange 10 Fig 6 Schematic Diagram of Operation normal operation 12 Fig 7 Schematic Diagram of Operation reversing operation 14 Fig 8 Positioning of Control Head 19 Fig 9 Maximum rpm Adjustment 21 Fig 10 Relief Valve Unlocking 22 Fig 11 Relief Valve Adjustment 22 Issue 1 Page 2 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com LIST OF REVISIONS Issue Date of Issue Page Short Description 1 2004 04 01 all Original Issue 2 2004 09 13 3 4 16 Item 4 3 4 Update of TBO 3 2005 04 20 3 4 22 Small corrections to item 10 0 Issue 3 Page 3 2005 04 20 ATA 61 20 46 mi propeller LIST OF EFFECTIVE PAGES Page Date of Issue 1 2004 04 01 2 2004 04 01 3 2005 04 20 4 2005 04 20 5 2004 04 01 6 2004 04 01 7 2004 04 01 8 2004 04 01 9 2004 04 01 10 2004 04 01 11 2004 04 01 12 2004 04 01 13 2004 04 01 14 2004 04 01 15 2004 04 01 16 2004 09 13 17 2004 04 01 18 2004 04 01 19 2004 04 01 20 2004 04 01 21 2004 04 01 22 2005 04 20 23 2004 04 01 24 2004 04 01 25 2004 04 01 26 2004 04 01 Page 4 A Flugplatz Straubing Wallm hle 94348 Atting Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com Issue 3 2005 04 20 ATA 61 20 46 mi prop
19. of governed speed Internal leakage at 1 750 rpm output pressure 18 1 bar temperature 75 3 C 170 F Governor stability Total control arm angular travel Table of Governor Types A Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com max 1 7 kg see fig 3 from engine CCW CW lever according to engine piston engine oil from engine oil system 24 or 12V 3 0 3 bar 43 5 4 4 psi 38 5 1 5 bar 558 22 psi 22 bar 1 bar 320 psi 10 psi 20 to 80 C 68 to 176 F 20 to 110 C 4 to 230 F min 7 l min 7 5 qu min 1 000 to 3 000 rpm max 2 0 I hour 2 1 qu min t5 max 90 For all governor types please refer to MT Propeller Governor List E 1057 Issue 1 2004 04 01 ATA 61 20 46 mi propeller Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 Fax 49 0 9429 8432 sales mt propeller com 4 3 Operational Conditions 4 3 1 Altitude 0 to 8 500 m 0 to 28000ft 4 3 2 Temperature ranges 20 to 110 C 4 to 230 F 4 3 3 Flight maneuvering load factor 8g 5g 4 3 4 Time between overhaul 1 500 flying hours or 6 calendar years 4 3 5 Maximum permitted RPM 3500 RPM continuously for standard reciprocating engines 5 0 GOVERNOR INSPECTION BEFORE INSTALLATION ON THE ENGINE After unpacking the governor must be inspected whether it is damaged for example after
20. ted on a engine flange which is out of operation it is necessary to check it s condition each 6 months According to this inspection repeat it s conservation Issue 1 2004 04 01 ATA 61 20 46 mi propeller 15 0 15 1 15 2 15 3 15 4 15 5 Page 25 Flugplatz Straubing Wallm hle 94348 Atting Germany Tel 49 0 9429 9409 0 TROUBLE SHOOTING Fax EEN sales mt propeller com Propeller Surging or Wandering Possible Causes EXCESSIVE TRANSFER BEARING LEAKAGE Engines with excessive transfer bearing leakage can experience surging since the governor may not be able to get enough pressure to the propeller This causes a delay in propeller responsiveness and by the time the propeller responds to earlier governor inputs they have changed resulting in propeller wandering Solution Perform a transfer bearing leakage test per engine manufacturer s instructions If test indicates a high rate of leakage even though it may still be on the high side of acceptable tolerance this maybe your cause Install the suspect governor on a known good aircraft if problem disappears engine work may be indicated MALFUNCTIONING MAGNETOS See the engine manual DIRTY ENGINE OIL Contaminants in dirty engine oil can cause blockage of close tolerance passages in governor leading to erratic operation Solution Timely engine oil changes should eliminate this problem EXCESSIVE PLAY IN AIRCRAFT PROPELLER CONTROL LINKAGE Ex
Download Pdf Manuals
Related Search