S E R V I C E No. 354B PIPER BULLETIN

S ER V I C E No. dsVoidsVoidsandandandandCorporationFAA rviceServiceServiceServiceHaven,LockMay 19, 1982Fuel Selector Valve LubricationReason for Revision:Revise Serial Numbers,parts.Models Affected :Serial Numbers Affected :PA-18 Super Cub SeriesPA-20 Pacer SeriesPA-22 Tri-PacerPA-24-180 ComanchePA-24-250 Comanche18-1 to 18-7909039 Inclusive20-l to 20-1121 InclusLve22-l to 22-9393 Inclusive24-1 and Up.24-l to 24-2174 Inclusive24-2176 to 24-2298 InclusiveComplianceU. S.A.SBulletin No. 141 dated October 4, 1955.)Letter No. 351 dated December 23, 1960 .)Bulletin No. 354 dated une 5 1972.Bulletin No. 354A date d April 19, 1J 82.)Subject:NOTE :Pennsylvania,announce replacementThis Bulletin applies to only those aircraft equipped with metal plug fuelselector valve with Part No. 11383-00, -02, -03, or -04. If originalinstallation has been replaced with Plastic Plug Fuel Selector Valve withPiper Part Number 77413-02 refer to Piper Service Letter No. 944.Time :1.Within the next ten (10) hours of operation from Effectivity Date, below, checkfuel selector valve for ease of rotation.Repeat at 100 hour intervals.a.If selector is difficult to rotate, comply with provisions of Instructionson Page 2.b.If selector rotates easily, no further action is required at this time (SeeCompliance Time, section 2, below .).2,Aircraft with 400 hours or more time in operation; within the next one hundred(100) hours of operation or at one year’s time from Effectivity Date, below,whichever occurs first.Comply with Instructions on Page 2.Aircraft with less than 400 hours time in operation; at 400 hours of operation orone year’s time from Effectivity Date, below, whichever occurs first.Complywith Instructions on Page 2.(over)

Service BulletinCompliance2.No. 354BPage 2 of 6Time : (continued)continuedThe inspection/maintenanceprovisions of this Service Bulletin are to be repeatedat every 400 hours of operation or annually, whichever occurs first.This inspection/maintenanceprocedure must also be conducted whenever the FuelSelector Valve is difficult to operate.Purpose :The fuel selector valve installed in the above referenced aircraft models is a threeposition type valve Piper Part Numbers 11383-00, -02, -03 and -04 (depending onaircraft model application).An integral part of the above valves is the tapered plugwhich is the focal point of this Service Bulletin in the area of proper maintenanceprocedures.The tapered plug unless properly lubricated,is subject to binding or “freezing”,causedby (1) fuel coming in contact with the plug and gradually dissolving the film of lubricant,(2) presence of foreign material,and (3) hardened or congealed lubricants (usually causedby improper lubricant).The primaryand properlyInstructions1.2.3.4.5.:With the valve removed from the aircraft,remove the valve cap and interior parts(see attached sketch for an exploded view of valve components).Inspect position washer inner perimeter surface for indications of extreme wear;should this be evident, replace position washer.(See Material Required, below .)Check condition of plug and valve body for scored surfaces.The surfaces, if not badlyscored, may be conditioned by lapping with a fine grinding compound. Clean away allcompound after lapping. If plug will not seat properly or if scoring remains evident,replace valve with Valve Replacement Kit 764 295.Check condition of valve stem in the area where the “0” ring seats. Should the stembe worn or damaged so that the “0” Ring will not seal, replace valve with ValveReplacement Kit 764 295.With a 10x magnifying glass, inspect valve ports for cracks; if cracks are visible,replace valve with Valve Replacement Kit 764 295.NOTE :6.objective of this Service Bulletin is to insure that these valves are periodicallyinspected and lubricated, in accordance with Instructions,below.Valve Replacement Kit 764 295 contains Valve, Piper Part No. 77413-02.Refer to Piper Service Letter No. 944 if Part No. 77413-02 is installed.Clean valve of all foreign matter, lubricate plug with a light film of MIL-G-6032(Type I) grease, turn the plug several times in its seat and wipe off any excess,especially in the valve ports. Also, lubricate position washer with a light film ofMIL-G-6032 (Type I) grease. Reassemble valve with a new “0” ring, Piper PartNumber 752 822.

ServiceBulletinInstructionsPage 3 of 6No. 354B: (continued)7. Rotate fuel selector to check for smooth operation and to insureseating in detent positions.8. Before reinstallingvalve, it may be checked by attaching an airdeterminingthat it will withstand50 PSI of air pressure without9. After reinstallationof valve, check operation and check for fuel10. Make appropriatelogbook entry of compliancewith this ServiceMaterial1.2.3.4.properhose , Plug Valve (Type I) which may be procured locallyunder the brand names specified on the Qualified Products List (of productsqualifiedunder militaryspecificationMIL-G-6032)reproducedon pages 5and 6.One (1) each per aircraftPosition Washer, Piper Part Number 756 645.One (1) each per aircraft“0” Ring, Piper Part Number 752 822.Only if requiredper Instruction3, 4 or 5, Valve ReplacementKit 764 295.AvailabilityEffectivityof Parts lity.in effectiveupon receipt.Please contact your Piper Field Service Facilityto makeSummary:arrangementsfor compliancewith this Service Release, which is submitted in theinterestof helping you maintain your fuel system in proper operating condition.

ValveCapCrushWasher“0”Service BulletinPage 4 of 6Ringe--WashergijJ--springBrass Washer counterbored;properlycounterboredsurfaceto reinstallmust facePosition WasherCheck inside perimeterfor indicationof extreme wear; if wear is readilyapparent,replace position washer.Lubricatewith MIL-G-6032(‘Type I)prior to reinstallation.MetalCheck ports for cracks; if cracksare evident, replace valve.Remove excess grease fromports prior to reinstallation.Fuel SelectorValveNo.354B

ServiceBulletinNo.354BPage 5 of 6QPL-6032-102 IEDPRODUCTS LISTOFUNDER MILITARY SPECIFICATIONPRODUCTS QUALIFIEDFSC9150ML-G-6032GREASE, PLUG VALVE, GASOLINE AND OIL ecifiedinrevisionor osesofwithISforbyoortheofwillthe fthecoveredbytheoftheendorsementundertheThis listnecessary.UseproductsconnoterequirementsIS subjectlistingoffortoa TESTBP AeroGrease32theIntendednotlistedissuethis listGovernment anceresponsibleusesuch listingBP ACTURER’SNAMEREFERENCENo.AMDMA 7687511AirQUALIFI-13 Dee1967ANDADDRESSBP EnglandPlant:0.J. teNo. 6328Report78487-6620 DeeNo.of1966GermanyDistribtuodby:Bray Oil Company1925 N. MariannaAve.Los GrearoWestWichita,Plant:3148GreasePV& feldType 1(Royce32)RoadCity,MO. 64111ReportNo. NAECAML- 1890 ofDi stri butodCastro1Oils13 FebCastro1Limited254-266Newark,DaremusAve.N.J. 071051964Co.,WatermanKansasSouthwestCo.,(L adHanover,N. J. 07936Plant:Sameaddress1 of 2QPL-6032- 10

ServiceBulletinNo. 354BPage 6 of SDESIGNATIONDESIGNATIONTESTCATIONI (L237)TypeI (Rockwell950)MANUFACTURER’SNAMERockwel(Bulk)I 950ReportNo.AML-189113 FebNAEC-RockwellofMfg.400 ellANDADDRESSTennecoChemicals,Inc.NuodexDivisionP. 0. Box 2Pi scataway,N.J. 08854Plant:Chestertown,Md. 21620ReportNo. NAECAML- 1889 of13 Feb 1964L-237TypeOR QUALIFIREFERENCECompanyLexingtonAve.Pa. 15208Sameaddress950(Stick)TypeTypeI (RoyceI (Code32)16125)Royce32UI tra-SeolReportNo. NAECAML- 1890 of13 Feb w JerseyPlant:Same addressNo.SouthwestCompany,220 West78487-66 of20 Dee 1966Wichita,Type II(Code16822)Ultra-Seal822Ah4DReport769352 of10 Sep 1968No.GreaseInc.WatermanKansasI ttenfeldInc.Division2 ofReportNo. NAECAML-1887ofUnitedErie,13 FebPlant:1964*U. S. GOVERNMENTPRINTINGOFFICE:1969 -P. 0.BoxErie,Pennsylvania34 I-515:A.3921andandRoadMO. 64111Oil :Southwest3148 RoanokeKansasCity,TypeCompanyCompanyOil

GREASE, PLUG VALVE, GASOLINE AND OIL RESISTANT . Type I (Rockwell 950) Rockwel 950 Report No. NAEC- Rockwell Mfg. Company (Bulk) AML-1891 of 400 North Lexington Ave. 13 Feb 1964 Pittsturgh, Pa. 15208 Plant: Same address Type II (Rockwell 950) Rockwell 95