SAFRAN"'-...:/Turbo"TIE'Cd40220Tarnos-FranceTel.+33(0)559744000Fax+33(0)559744515MANDATORYSERVICEBULLETINARRIEL2No.292722849Subject:41/23toothbevelgearassemblyoftheaccessorygearbox(moduleM01).ApplicationofTlNo.292722849orNo.292722850referencingvibrationcheck.ThetechnicalinformationcontainedinthisdocumentisapprovedundertheAuthorityofDesignOrganizationApprovalNo.EASA.21J.070.DateonwhichthisMandatorySBbecomeseffectiveandmustsystematicallybecompliedwith,accordingtotheconditionsofapplication.ApplicablefromNOVEMBER2013Iftheresources(parts,tools,documentation,etc.)areavailableanyearlier,theMandatorySBmay,beappliedpriortotheeffectivitydate.Version:CReasonforupdate:AccuracyoncomplianceconditionsNOTES(paragraph2.2).Applicablevariants.ARRIEL2B-B1-B1A-B1BSB292722849EN-C<June18,2014>-1I10...,SAFRAN......_.,JrbO<nE'CMANDATORYSERVICEBULLETIN2.APPLICATIONATTHEOPERATOR'SSITEORBYAMAINTENANCECENTERQUALIFIEDFORLEVEL1,2WARNING:FAILURETOAPPLYTHISMANDATORYSERVICEBULLETINMAYLEADTOANUNCOMMANDEDIN-FLIGHTENGINESHUT-DOWNWHICH,ONASINGLE-ENGINEHELICOPTER,MAYLEADTOANEMERGENCYAUTOROTATIONLANDING.2.1.Requiredactions2.1.1.Attheoperator'ssiteApplicationbeforethe31stofOctober2016.ApplyTlRef292722849tocheckmeshingvibrationlevelof41/23toothbevelgearofmoduleM01accordingtoparagraph2.3.Considerthevibrationcheckresults:refertoparagraph2.3.2.1.2.2.1.2.ByaMaintenanceCenterApplicationbeforethe31stofOctober2016.ApplyTlRef292722850tocheckmeshingvibrationlevelof41/23toothbevelgearofmoduleM01iftask71-02-15-760-801-A01oftherelevantARRIEL2MaintenanceManualisapplied:refertoparagraph2.3.2.2.EffectivityandcompliancetimesENGINEIVARIANTCODECONDITIONSOFAPPLICATIONFORENGINESINSERVICEARRIEL28-281-281A-28181-BApplicationbeforethe31stofOctober2016.ApplicationofthisMandatoryS8isconsideredmandatoryasaresultofatechnicalrequirementwhichmightaffectflightsafetyofenginesinservice.Itmaybedoneasdefinedbytheeffectivitycodegiveninthetableabove.Note1:ThisMandatoryS8doesnotapplyifacompleted41toothgearvibrationcheckisindicatedonthemoduleM01logcard:-ReferencetoServiceLetter(SL)No.2892/13/ARRIEL2,-OrreferencetoInternalDirective(CI)No.383952,-OrreferencetoRepairTechnicalInstruction(RTI)Ref.X292653272,-OrreferencetoAirworthinessDirective(AD)No.2014-0036,-OrthelogcardisdatedafterJanuary31,2014,whichcorrespondstoupdateoftheacceptanceCCTincludingthesystematicvibratorycheckonbench.-OrifthisMandatoryS8wasapplied(allengineversions).-OrifthemoduleM01SerialNumberisgivenbelow.Note2:ThisMandatorySBappliesataMaintenanceCenteriftask71-02-15-760-801-A01oftherelevantARRIEL2MaintenanceManualwasalreadyapplied:seeparagraph2.3.1.2.ListofmodulesM01thatarenotconcernedthisMandatorySBI(equivalenttofigure1,versionBofthisMandatorySB)VariantS/NM01VariantS/NM01281242811424281452811509281622811542281642811654284822811694285072811733285362811797285482811891Applicablevariants.ARRIEL2B-B1-B1A-B1B§2.1/6SB292722849EN-C<June18,2014>-3/10_.,SAFRAN......_;/t'CMANDATORYSERVICEBULLETIN2.3.1.2.1.ApplyTlRef292722850tocheckmeshingvibrationlevelof41/23toothbevelgearofmoduleM01.2.3.1.2.2.IdentifymoduleM01statusinthemoduleM01logcard:refertoparagraph2.3.4.2.2.3.2.OperatinginstructionsWARNING:FAILURETOAPPLYTHISMANDATORYSERVICEBULLETINMAYLEADTOANUNCOMMANDEDIN-FLIGHTENGINESHUT-DOWNWHICH,ONASINGLE-ENGINEHELICOPTER.MAYLEADTOANEMERGENCYAUTOROTATIONLANDING.2.3.2.1.Attheoperator'ssite(equivalenttoparagraph6.B.(1),inversionBofthisMandatorySB)2.3.2.1.1.ApplyTlRef292722849.2.3.2.1.2.ActionsaccordingtothevibrationcheckresultspecifiedintheemailsentbyTURBOMECAorinthereportgeneratedbytheB&Kserver:>Level1-Greenindicator:keepmoduleM01inservice.>Level2-Yellowindicator:removemoduleM01within150hoursor3months(whicheverisreachedfirst).>Level3-Orangeindicator:removemoduleM01within25hours(orearlier,dependingontherecommendationsmadebyTURBOMECA)or3months(whicheverisreachedfirst).2.3.2.1.3.>If"measureinvalid",contactyourTURBOMECArepresentative.SendanacknowledgementofreceiptbyemailorfaxtoyourNORIAcoordinatorJ/71-Aj(refertoparagraph2.4.3)confirmingthatthestatusofmoduleM01hasbeentakentt£-V'mtoaccount.2.3.2.2.ByaMaintenanceCenterIfmaintenancetask71-02-15-760-801-A01oftherelevantARRIEL2MaintenanceManualisapplied:2.3.2.2.1.ApplyTlRef292722850.2.3.2.2.2.Actionsaccordingtothevibrationcheckresult:>Compliantresult:releasemoduleMOlintoservice.>Non-compliantresult:returnmoduleMOltoaRepairCenter.2.3.3.ReconditioningandchecksPerformagroundruncheck:refertotherelevantARRIEL2MaintenanceManual,task71-02-13-280-801..dentification2.3.4.1.Attheoperator'ssite2.3.4.1.1.RecordtheapplicationofthisMandatorySBonthemoduleM01logcardindicatingthemeasurementlevelasfollows:"level1-green"."level2-yellow"or"level3-orange",aswellasthemoduleM01TSNatthetimeofthemeasurement.2.3.4.1.2.Ifnecessary.notifyTURBOMECAthatstandardexchangeofmoduleM01hasbeenperformedbyreturningthefullycompletedcompliancecertificate(Appendix2.1).2.3.4.2.ByaMaintenanceCenter2.3.4.2.1.Ifthevibrationcheckresultiscompliant,recordthe applicationofthisMandatorySBonthemoduleM01logcard.2.3.4.2.2.Ifthevibrationcheckresultisnotcompliant,notifyTURBOMECAthatstandardexchangeofmoduleM01hasbeenperformedbyreturningthefullycompletedcompliancecertificate(Appendix2.1).Applicablevariants:ARRIEL2B-B1-B1A-B1B§2-3/6SB292722849EN-C<June18,2014>-5I10SAFRANMANDATORYSERVICEBULLETIN2.6.Toolingand/orproducts2.6.1.Attheoperator'ssite-Mechanic'sstandard tooling.-RefertoTlRef292722849.2.6.2.ByamaintenanceCenter-Mechanic'sstandardtooling.-RefertoTlRef292722850.2.7.WeightandbalanceNotapplicable.2.8.PublicationreferencesDocumentMaintenanceManual(MM)SparePartsCatalog(SPC)TechnicalInstruction(TI)ServiceLetter(SL)InternalDirective(CI)AirworthinessDirective(AD)RepairTechnicalInstruction(RTI)Applicablevariants:ARRIEL2B-B1-B1A-B1BEngineReferenceARRIEL28X292M54502ARRIEL281X292N54502ARRIEL281AX292P44502ARRIEL28X292M57002ARRIEL281X292N57002ARRIEL281AX292P47002ARRIEL28-281-281A292722849292722850ARRIEL22892/13383952ARRIEL1&ARRIEL22014-0036X292653272§2-5/6SB292722849EN-C<June18,2014>-7I10..SAFRAN...__;;ITU!JOlT'C lMANDATORYSERVICEBULLETIN3.APPLICATIONBYAMAINTENANCECENTERQUALIFIEDFORLEVEL3RefertotheparagraphsapplyingtotheMaintenanceCentersasdescribedinchapter§2.ENDofsection§3"ApplicationbyaMaintenanceCenterqualifiedforlevel3"Applicablevariants:ARRIEL2B-B1-B1A-B1B§3-1/1SB292722849EN-C<June18,2014>-9I10