CFM International SB 72-1129: Revision 2

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne

CFM PROPRIETARY INFORMATION TheinformationcontainedinthisdocumentisCFMproprietaryinformationandisdisclosedin con/g191dence. ItisthepropertyofCFMandshallnotbeused,disclosedtoothersorreproduced withouttheexpresswrittenconsentofCFM,including,butwithoutlimitation,itisnottobeusedin thecreation,manufactur e,development,orderivationofany repairs,modi/g191cations,spareparts, design,orcon/g191gurationchangesortoobtainFAAoranyothergovernmentorregulatoryapproval todoso. Ifconsentisgivenforreproductioninwholeorinpart,thisnoticeandthenoticeset forthoneachpageofthisdocumentshallappearinanysuchreproductioninwholeorinpart.

TheinformationcontainedinthisdocumentmayalsobecontrolledbyU.S.exportcontrollaws.

Unauthorizedexportorre-exportisprohibited.

Alltechnicaldocumentationandinformation containedherein,withrespecttoassemblyand disassembly,cleaning,inspectionmethodsandlimit s,repairmethodsandlimits,operational limits,lifelimitsandthelike,havebeendevelopedandapprovedforusewithenginesandparts thathavebeenmanufacturedand/orapprovedbyCFMandthathavebeenmaintainedin accordancewithCFMtechnicaldocumentationandrecommendations. CFMhasnocontractual orlegalobligationfor,norknowledgeof,non-CFM-approvedpartsandrepairs. Accordingly,this documentisnotintendedtoapplytonon-CFM-approvedpartsandrepairs.

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 1 of 46

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne

1. PLANNINGINFORMATION A. Effectivity CFM56-3,-3B,-3C

(1) TheoldAccessoryGearboxassembly(AGB)335-300-110-0anditsoldcomponents (Refertoparagraph2.C.C ONFIGURATIONCHART)installedonCFM56-3engines orstockedassparesareaffected.

(2) ThenewAccessoryGearboxassembly335-300-112-0anditsnewcomponents (Refertoparagraph2.C.C ONFIGURATIONCHART)willbeintroducedasspare parts.

NOTE: ThereisnoCFM56-3engineinproductionlineanymore.

B. Description ThisServiceBulletinannouncesthesparepartsavailabilityofthefollowing:

-AnewAccessoryGearboxassembly335-300-112-0equippedwithanewhandcranking lineoilsealassy335-317-805-0,anewhandcrankingcoverassy335-322-806-0andanew starterdrivepadassy335-300-807-0. Referto/g191gure1,/g191gure2and/g191gure3.

-Forthedetailsofnewstarterdrivepadassy335-300-807-0,refertoparagraph2.C.

CONFIGURATIONCHARTand/g191gure4.

ThisServiceBulletinprovidesalsotheaccomplis hmentinstructionstoreworkandreidentify theoldAGB335-300-110-0tothenewAGB335-300-112-0.

C. Compliance Category3 Doatnextengineshop visitopportunity.

NOTE: ThisServiceBulletincanbeaccomplishedinshop.

D. ConcurrentRequirements None.

E. Reason

(1) Objective:

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 2

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne INTRODUCTIONOFNEWPARTS.

Toimprovethereliability.

(2) Condition:

SomecasesofengineoillosshavebeenreportedandresultedinIFSD(InFlight ShutDown).

(3) Cause:

GroundinvestigationsshowedthattheAGBhandcrankingcoverassywasnot installedorincorrectlyinstalled.

(4) Improvement:

Modi/g191cationoftheAGBbytheintroductionofanewoilsealassyonthenewstarter drivepadassyandanewhandcrankingcoverassytopreventoilleakagefrom handcrankingpad.

(5) Substantiation:

Substantiationisbytestingandcomparativeanalysis.

F. Approval ThetechnicalcontentofthisdocumentisapprovedbytheFAAandundertheauthorityof DOAn°EASA.21J.086.

G. Manpower Youwillneedapproximately4man-hourstoreplacetheoldstarterdrivepadassybythe newoneontheAGB.

H. WeightandBalance Accomplishment of this Service Bulletin will result in a weight increase of

0.227lb(0,103kg).

I. References CFM56-3 Illustrated Parts Catalog, CFMI-TP.PC.8 CFM56-3 Engine Shop Manual, CFMI-TP.SM.5 CFM56 Standard Practices Manual, CFMI-TP.SP.2 CFM56 Consumable Products Manual, CFMI-TP.CP.3 CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 3

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne CFM56 Illustrated Tool and Equipment Manual, CFMI-TP.TE.10 CFM56-3 S/B 72-0155 ENGINE - Accessory Gearbox - Deletion of the Sealol Seal Assy Installed on the Handcranking Bearing Housing BOEING737-300/400/500AircraftMaintenanceManual NOTE: Thereferencedocumentslistedbelowarefortheenginemanufacturer'sinternal useonly:

AAS : 27828 CAD: MOD095001 AAS : 27160 CAD: MOD051442 J. PublicationsAffected CFM56-3IllustratedPartsCatalog,CFMI-TP.PC.8,ATA72-63-00 CFM56-3EngineShopManual,CFMI-TP.SM.5,ATA72-63-00 CFM56IllustratedToolandEquipmentManual,CFMI-TP.TE.10 BOEING737-300/400/500AircraftMaintenanceManual K. Interchangeability ThephysicalinterchangeabilityoftheAGBa ssemblyisaffectedbytheintroductionofa newstarterdrivepadassywithanewoilsealassy. Thefunctionalinterchangeabilityof theAGBassemblyisnotaffected.

Thenewstarterdrivepadassywithanewoi lsealassyisinterchangeableonlyasaset withtheoldstarterdrivepadassy.

Thenewhandcrankingcoverassyisnotinterchangeablewiththeoldone.

Theoldandnewpartscannotbemixed.

L. SoftwareAccomplishmentSummary None.

2. MATERIALINFORMATION A. Material-PriceandAvailability

(1) Partsnecessarytodo thisServiceBulletin:

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 4

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne PartNumber Qty/ Eng PartName Unit $Price Pkg Qty Lead Time Days 333-089-185-000 (1) LogisticKit 10,170.00 (1) Quote .335-300-807-0 (1) Pad Assy- Starter Drive 6,600.00 (1) 7 .335-322-806-0 (1) Cover Assy- Handcranking 1,250.00 (1) 7 .335-317-805-0 (1) SealAssy-Oil 2,320.00 (1) 30 649-393-163-0 (1) Preformed Packing O-Ring

16.75 (10) 30 J221P163 (Alt) Preformed Packing O-Ring

14.00 (10) 7 649-393-158-0 (1) Preformed Packing O-Ring

12.25 (25) 30 J221P158 (Alt) Preformed Packing O-Ring

7.00 (25) 5 649-393-153-0 (1) Preformed Packing O-Ring

- (-) - J221P153 (Alt) Preformed Packing O-Ring

5.00 (25) 10 J626P03 (3) Nut-SelfLocking 3.10 (25) 10 649-310-003-0 (Alt) Nut-SelfLocking - (-) - 649-341-010-0 (3) Washer-Plate 3.80 (50) 7 649-393-032-0 (1) Preformed Packing O-Ring

- (-) - J221P032 (Alt) Preformed Packing O-Ring

2.25 (25) 10 649-393-013-0 (2) Preformed Packing O-Ring

0.65 (100) 30 J221P013 (Alt) Preformed Packing O-Ring

0.57 (25) 10 649-393-114-0 (1) Preformed Packing O-Ring

- (-) - J221P114 (Alt) Preformed Packing O-Ring

0.65 (100) 5 CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 5

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne NOTE1: Pricescanchange.

NOTE2: Thiskit333-089-185-000isaddedonlytofacilitatethespareparts orderingprocess,buteachpar tcanbealsopurchasedseparately.

(2) OtherSpareParts:

PartNumber Qty/ Eng PartName Unit $Price Pkg Qty Lead Time Days 335-300-112-0 (1) Gearbox Assy - Accessory Quote (-) Quote NOTE: Pricescanchange.

(3) Consumables:

CodeNumber Description CP1039 Acetone CP2101 GraphiteCompound CP2442 EngineOil CP5069 CalibrationFluid CP5070 Vaseline B. IndustrySupportInformation Parts: CFMwillprovidea50%back-enddi scountonthelogistic kit333-089-185-000.

Refertoparagraph2.A.Ma terial-PriceandAvailability.

Labor: CFMwillsupportthe4manhoursnecessarytoreworktheoldAGBtothenewone.

Allwarrantyclaimsforcreditrequestonthelogistickitandthelabormustbesubmitted withinoneyearofcomplianceandbyDecember31,2016. SendaWarrantyClaimwiththe numberofthisServiceBulletintoCFMthroughyourroutinechannelorto:

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 6

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne Europe,MiddleEast,andAfricaRegionCustomers CFMSACustomers CFMCustomerSupportOperation Attn: WarrantyandGuaranteeManager c/oSnecma-SitedeMelun-Montereau AerodromedeVillaroche-BP1936 77019MelunCedex-France Tel: 33(0)164.14.85.72 Fax: 33(0)164.14.87.65 NorthandSouthAmericaandAsiaCustomers CFMInc. Customers CFMInternationalInc.

Attn: ManagerWarrantyAdministration OneNeumannWay-Room444 Cincinnati,OH 45215-1988USA Tel: 15135522000 Fax: 15135525081 C. Con/g191gurationChart NewPartNumber Qty/ Eng PartName Old PartNumber/ IPCLocation Qty/ Eng OP Chg/ Sprt Code 9325M80G01-G02-G03 -G04-G05 (X) EngineAssy 9325M80G01-G02-G03 -G04-G05 72-00-00-22-001 (X) RM -/- 9325M85G01-G02-G03 -G04-G05 (X) EngineAssy 9325M85G01-G02-G03 -G04-G05 72-00-00-22-001 (X) RM -/- 9325M90G01-G02-G03 (X) EngineAssy 9325M90G01-G02-G03 72-00-00-22-001 (X) RM -/- .335-300-112-0 (1) Gearbox Assy - Accessory .335-300-110-0 72-00-00-22-930 72-63-00-04-001 72-63-00-10-001

(1) SU/ RW/ RI 1/A .. J626P04 (1) Nut-SelfLocking ..J626P04 72-63-00-04-440

(1) RM -/- .. 649-671-392-0 (Alt) Nut-SelfLocking ..649-671-392-0 72-63-00-04-440 (Alt) RM -/- .. 649-393-012-0 (1) Packing-Preformed O-Ring ..649-393-012-0 72-63-00-04-450

(1) RM -/- .. J221P012 (Alt) Packing-Preformed O-Ring ..J221P012 72-63-00-04-450 (Alt) RM -/- .. 649-393-013-0 (1) Packing-Preformed O-Ring ..649-393-013-0 72-63-00-04-460

(1) RM -/- CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 7

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne NewPartNumber Qty/ Eng PartName Old PartNumber/ IPCLocation Qty/ Eng OP Chg/ Sprt Code .. J221P013 (Alt) Packing-Preformed O-Ring ..J221P013 72-63-00-04-460 (Alt) RM -/- .. 335-310-300-0 (1) Nozzle-Oil ..335-310-300-0 72-63-00-04-470

(1) RM -/- .. 335-300-807-0 (1) Pad Assy - Drive Starter ..335-300-803-0 72-63-00-04-480 seeNote4

(1) SU 5/A ... 300-300-904-0 (1) Pad-DriveStarter ...335-300-902-0 72-63-00-04-600

(1) SU 5/A ... 300-300-904-0 (-) Pad-DriveStarter ...335-300-903-0 72-63-00-04-600 (Alt) SU 5/A ... J1037P06 (1) Nipple ...J1037P06 72-63-00-04-590

(1) RM -/- ... 649-393-012-0 (1) Packing-Preformed O-Ring ...649-393-012-0 72-63-00-04-580

(1) RM -/- ... J221P012 (Alt) Packing-Preformed O-Ring ...J221P012 72-63-00-04-580 (Alt) RM -/- ... J970P06 (2) Insert - Screw Threaded ...J970P06B 72-63-00-04-570

(2) SU 5/E ... 649-079-401-0 (1) Stud-LockedInKey Locked ...649-079-401-0 72-63-00-04-560

(1) RM -/- ... 649-079-402-0 (3) Stud-LockedInKey Locked ...649-079-402-0 72-63-00-04-550

(3) RM -/-

- (-) Insert ...REA048SF (301-487-200-0) 72-63-00-04-540

(3) DE 5/E ... 301-487-002-0 (2) Pin-Centering ...301-487-002-0 72-63-00-04-520

(2) RM -/- ... J970P04 (5) Insert - Screw Threaded ...J970P04B 72-63-00-04-500

(5) SU 5/E ... SRK374L (8) Insert-KeyLocked ...SRK374L 72-63-00-04-510

(8) RM -/- CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 8

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne NewPartNumber Qty/ Eng PartName Old PartNumber/ IPCLocation Qty/ Eng OP Chg/ Sprt Code ... 649-079-400-0 (3) Stud-LockedInKey Locked

- (-) AD 5/- ... 340-152-101-0 seeNote4

(5) Plug - (-) AD 5/- .. 335-310-200-0 (1) Spool ..335-310-200-0 72-63-00-10-240

(1) RM -/- .. J221P114 (1) Packing-Preformed O-Ring ..J221P114 72-63-00-10-220

(1) RM -/- .. 649-393-114-0 (Alt) Packing-Preformed O-Ring ..649-393-114-0 72-63-00-10-220 (Alt) RM -/- .. J221P013 (2) Packing-Preformed O-Ring ..J221P013 72-63-00-10-230

(2) RM -/- .. 649-393-013-0 (Alt) Packing-Preformed O-Ring ..649-393-013-0 72-63-00-10-230 (Alt) RM -/- .. 335-322-806-0 (1) Cover-Assy ..335-322-802-0 72-63-00-04-242

(1) SU 5/A ... 335-309-605-0 seeNote4

(1) Cover ...335-309-604-0 72-63-00-04-244

(1) SU 5/- ... 335-322-902-0 seeNote4

(1) Cable ...335-322-901-0 72-63-00-04-246

(1) SU 5/-

- (-) Packing-Preformed O-Ring ..J221P134 72-63-00-04-235

(2) DE 5/-

- (-) Packing-Preformed O-Ring ..649-393-134-0 72-63-00-04-235 (Alt) DE 5/-

- (-) Packing-Preformed O-Ring ..AS3085-134 72-63-00-04-235 (Alt) DE 5/-

- (-) Packing-Preformed O-Ring ..M83248-1-134 72-63-00-04-235 (Alt) DE 5/- .. 649-393-153-0 (1) Packing-Preformed O-Ring

- (-) AD 5/- .. 649-341-031-0 (5) Washer-/g192at ..649-341-031-0 72-63-00-04-220

(5) RM -/- CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 9

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne NewPartNumber Qty/ Eng PartName Old PartNumber/ IPCLocation Qty/ Eng OP Chg/ Sprt Code .. J644P11B (5) Bolt-MachDblHexHd ..J644P11B 72-63-00-04-210

(5) RM -/- .. 335-317-805-0 (1) OilSeal-Assy - (-) AD 5/- ... 335-324-301-0 (1) Packing-Preformed O-Ring

- (-) AD 5/- ... 335-320-403-0 (1) OilSeal-Subassy MatchedParts

- (-) AD 5/- .... 335-324-202-0 (1) OilSeal - (-) AD 5/- .... 335-317-702-0 (1) Ring-Mating - (-) AD 5/- .. 649-393-032-0 (1) Packing-Preformed O-Ring

- (-) AD 5/- .. J221P032 (Alt) Packing-Preformed O-Ring

- (-) AD 5/- .. J626P03 (3) Nut-SelfLocking - (-) AD 5/- .. 649-341-010-0 (3) Washer-Flat - (-) AD 5/- NOTE1: Speci/g191cation2000ChangeCodes

- = Not applicable.

1 = One way interchangeable.

5 = Quali/g191ed interchangeability - parts deleted.

5 = Quali/g191ed interchangeability - parts added.

5=Quali/g191edinterchangeability-Refertoparagraph1.KI nterchangeability.

NOTE2: SparePartsSupportCodes

- = Not applicable.

A = Old parts will no longer be supplied.

E=Oldpartswillbesupplied,andcanbeusedatotherenginelocations.

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 10

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne NOTE3: OperationCodes AD = Added DE = Deleted RI = Reidenti/g191ed RM = Remains RW = Reworked SU=Superseded NOTE4: Thispartisnotprocurable.

D. DispositionofParts PartNumbers335-322-802-0and335-300-803-0removedtoaccomplishthisService Bulletinmaybelocallyscrapped.

E. Tooling-PriceandAvailability ToolNumber Description 856A3545G03 RiggingFixture 856A1130G01 ToolSet,Jackscrews 856A2971G02 Removal/Installation,SealolandMagneticSeals 856A2979G01 ToolSet,Target-AGBOilNozzle(LineN°2)AirImpingement Check 856A3548G02 ToolSet,Targets-AGBOilNozzleAirImpingementCheck 856A3549G02 ToolSet,LeakTest-AGB

3. ACCOMPLISHMENTINSTRUCTIONS NOTE1: ChangesintroducedbythisServiceBulletinhavenoeffectontheremoval/installation anddisassembly/assemblyofAGBassemblyexceptfortheimpingementtestof theoilnozzle.

NOTE2: ChangesintroducedbythisServiceBulletinhavenoeffectontheremoval/installation anddisassembly/assemblyofstarterdrivepadassemblyexceptfortheinstallation ofthenewoilsealassy.

CAUTION: TOPREVENTINJURY,INSTALLAPROTECTIVECOVERONTHEFREE ENDOFOLDCABLE 335-322-901-0OFTHEOLDHANDCRANKINGCOVER ASSY335-322-802-0WHENYOUREMOVETHEFUELSUPPLYTUBEASSY 335-216-301-0OR335-216-302-0FROMTHEOLDAGB 335-300-110-0.

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 11

ENGINE-General(72-00-00)-IntroductionofaNewAccessoryGearboxAssembly(AGB)withaNew StarterDrivePadandNewHandcrankingCoverandReworkofOldAGBtotheNewOne A. RemovaloftheoldAGBassembly335-300-110-0equippedwithitsoldstarterdrivepad assembly335-300-803-0andhandcrankingcoverassembly335-322-802-0fromthe engineassembly. RefertoEngineShopManual(ESM),ATA72-00-63,Removal001.

Referto/g191gure1.

B. Removaloftheoldhandcrankingcoverassembly335-322-802-0andstarterdrivepad assembly335-300-803-0fromtheoldAGBassembly335-300-110-0. RefertoEngineShop Manual(ESM),ATA72-63-00,Disassembly001. Referto/g191gure2,/g191gure3and/g191gure4.

NOTE: ThisstepconcernsthereworkofoldAGBassembly335-300-110-0tothenew AGBassembly335-300-112-0.

(1) Removetheoldhandcrankingcoverassembly335-322-802-0fromtheoldAGB assembly335-300-110-0asfollows:

(a) RemovetheboltJ644P06Awhichattatchtheoldcable335-322-901-0ofthe oldhandcrankingcoverassy335-322-802-0ontheAGB335-300-110-0.

(b) RemovetheboltsJ644P11Bandwashers649-341-031-0whichattachtheold handcrankingcoverassembly335-322-802-0.

(c) Removetheoldhandcrankingcoverassembly335-322-802-0,usetheP12of thetoolset-jackscrews,856A1130G01.

(d) Removeanddiscardtheoldhandcrankingcoverassembly335-322-802-0and twoO-ringsJ221P134or649-393-134-0orAS3085-134orM83248-1-134.

(2) Removetheoldstarterdrivepadassembly335-300-803-0withthehandcranking62 toothgearshaftassembly335-302-403-0fromtheoldAGBassembly335-300-110-0 asfollows:

(a) RemovetheboltsJ644P12Bandwashers649-341-031-0whichattachtheold starterdrivepadassembly335-300-803-0toAGBhousing.

(b) Removetheoldstarterdrivepadassembly335-300-803-0withthe handcranking62toothgearshaftassembly335-302-403-0,usetheP12of toolset-jackscrews,856A1130G01.

(c) Installaprotectiverubbercoverontheinnerraceoftherollerbearing 301-480-720-0or301-480-723-0or301-480-724-0or301-480-726-0or 340-055-801-0ofthe62toothgearshaftassembly335-302-403-0.

(3) Removethehandcranking62toothgearshaftassembly335-302-403-0fromtheold starterdrivepadassembly335-300-803-0asfollows:

CFM56-3/3B/3CS/B72-1129 March09,2011 PAGE 12