SL 842 - MAIN LANDING GEAR TORQUE LINK GREASER BOLT
Contents
1. B SERVICE LETTER Piper Aircraft Corporation Lock Haven Pennsylvania U S A FAA DOA SO 1 Approved September 26 1978 S Subject Main Landing Gear Torque Link Greaser Bolt Inspection and Replacement Models Affected Serial Numbers Affected PA 28 140 28 20001 to 28 7725290 Inclusive PA 28 150 28 1 to 28 4377 Inclusive PA 28 151 28 7415001 to 28 7715314 Inclusive PA 28 160 28 1 to 28 4377 Inclusive PA 28 161 28 7716001 to 28 7816253 Inclusive PA 28 180 28 671 to 28 7505259 Inclusive PA 28 181 28 7690001 to 28 7890231 Inclusive PA 28 235 28 10001 to 28 7710089 Inclusive PA 32 260 32 1 to 32 7700023 Inclusive PA 32 300 32 40001 to 32 7840043 Inclusive Compliance Time I Aircraft which have greaser bolts with 500 hours or more in service Inspect within the next 100 hours of operation and thereafter at intervals not to exceed 100 hours of operation from previous inspection fl Aircraft which have greaser bolts with less than 500 hours time in service Inspect at the 500 hour inspection period and at each subsequent 100 hour inspection NOTE Aircraft equipped with greaser bolts per Sketch A may install Kit 760 910V to alleviate the 100 hour inspection until a total of 500 hours of operation have been accumulated and then the bolts can be inspected at each 500 hours thereafter Aircraft equipped with greaser bolts per Sketch B may install new Bolt 79543 02 and alleviate the 100 hour inspection until a total of2. 500 hours of operation have been accumulated then can be inspected at each 500 hours thereafter Purpose There have been incidents where greaser bolts have been found with cracks rediating from the greaser hole in the groove Production aircraft with serial numbers subsequent to those listed above have had the greaser bolt replaced with a standard AN8 Bolt and new torque links In the field the greaser bolt with grooves can be replaced with a greaser bolt which incorporates grease holes only and no grooves over z Service Letter No 842 Page 2 of 3 Instructions 1 If the aircraft is on jacks the main gear struts must be deflated see appropriate Service Manual and the piston axle assembly supported before proceeding Otherwise proceed with Instruction 2 2 Remove the greaser bolt holding the main landing gear torque links together 3 Thoroughly inspect each bolt using a 10X magnifying glass or dye check or magnetic partical inspection for cracks as shown in Sketches A and B 4 If any cracks are found the bolt should be replaced See Material Required No 1 Dis On aircraft using the bolt shown in Sketch A we recommend this bolt be replaced with Piper Kit Number 760 910V even if no cracks are found See Material Required No 2 6 If the struts were deflated as required by Instruction No 1 re inflate the struts Refer to the appropriate Service Manual for proper inflation Ts Make appropriate log book ent
3. ry Material Required 1 For Instruction No 4 one 1 or two 2 non grooved greaser bolts Piper Part Number 79543 02 2 For Instruction No 5 one 1 Kit Bolt Main Gear Modification Piper Part Number 760 910V for each main landing gear two 2 required per aircraft Availability of Parts Your Piper Field Service Facility Effectivity Date This Service Letter is effective upon receipt Summary Please contact your Piper Field Service Facility to make arrangements for compliance with the provisions of this Service Release Service Letter No 842 Page 3 of 3 INSPECT THIS AREA SKETCH A SKETCH B GREASE FITTING
Download Pdf Manuals
Related Search