Bell 429 - Page 155

BHT-429-MPI
Table1.ConditionalInspections-MainRotorOverspeed(continued)
INITIAL
DATAREFERENCEINSPECTIONTASKDESCRIPTION
MECHOTHER
c.Sendthetransmissionassemblyortailrotorgearboxtoanapproved
repairfacilitytodisassemble,clean,anddoadetailedinspectionofthe
transmissionassemblyortailrotorgearbox,asapplicable.
429-MM,Chapter63
2.Examinetheengine-to-transmissiondriveshaftsforconditionand
securityofattachment.
429-MM,Chapter65
3.Examineallofthetailrotordriveshaftsforconditionandsecurityof
attachment.
4.Examinetheforwardandaftimpellersofthefanshaftassemblyfor
conditionwithaashlightandaninspectionmirror.
429-MM,Chapter71POWERPLANT
PW207D1/D2MM(P/N
3071602)
1.Doanengineoverspeedinspection.
COMPLETIONTASKS
429-MM,Chapter95
1.DownloadtheexceedancesandcleartheDUmemory.
AQUALIFIEDPERSONMUSTBEATTHEHELICOPTERCON-
TROLSDURINGTHEFOLLOWINGPROCEDURE.
BHT-429-FM-1,Section2
2.Starttheenginesanddoaone-hourgroundrun(100%rotorRPM
(N
R
)).
3.Visuallyexaminethetransmissionandengineoilsystemsandthefuel
systemforleakage.
4.Visuallyexaminethechipdetectorsofthetransmissionassembly
andtailrotorgearboxforcontamination.Iftherearenounwanted
particles,themainrotorandtaildrivesystemsareserviceable.Ifthere
areunwantedparticlesonachipdetector,dothefollowing:
429-MM,Chapter63
429-MM,Chapter65
a.Removethetransmissionassemblyorthetailrotorgearbox,as
applicable.
b.AttachaTHISCOMPONENTWASREMOVEDFROMSERVICE
BECAUSEOFAMAINROTOROVERSPEEDtagonthetransmission
assemblyortailrotorgearbox,asapplicable.
c.Sendthetransmissionassemblyortailrotorgearboxtoanapproved
repairfacilitytodisassemble,clean,anddoadetailedinspectionofthe
transmissionassemblyortailrotorgearbox,asapplicable.
5.Iftherearenounwantedparticles,thetransmissionassemblyandthe
tailrotorgearboxareserviceable.
6.Returnthehelicoptertoservice.
Applicableto:ALL429-A-05-50-00-03A-284A-A
ECCNEAR99
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