Pratt & Whitney Canada

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LOCK CUPWASHERS TO THE INLET CASE BOLTS - INTRODUCTION OF LOCK CUPWASHERS TO THE INLET CASE BOLTS - INTRODUCTION OF

MODEL

MODEL APPLICAAPPLICATIONTION PT6A-6

PT6A-6, , PT6A-6PT6A-6A, A, PT6A-PT6A-6B, 6B, PT6A-2PT6A-20, 0, PT6A-2PT6A-20A, 0A, PT6A-2PT6A-20B, 0B, PT6A-2PT6A-21, 1, PT6A-2PT6A-25, 5, PT6A-2PT6A-25A,5A, PT6A-25C, PT6A-27, PT6A-28, PT6A-34, PT6A-34AG, PT6A-34B, PT6A-35, PT6A-36, PT6A-114, PT6A-25C, PT6A-27, PT6A-28, PT6A-34, PT6A-34AG, PT6A-34B, PT6A-35, PT6A-36, PT6A-114,

PT6A-114A, PT6A-135, PT6A-135A PT6A-114A, PT6A-135, PT6A-135A Com

Complipliancance: e: CACATEGTEGORORY 7Y 7 Summa

Summary: ry: TTo ease the assemblo ease the assembly procedury procedure to attach the No.1 bearine to attach the No.1 bearing housing to the compreg housing to the compressorssor inlet case. This service bulletin replaces the lock-wire method with a cupwasher

inlet case. This service bulletin replaces the lock-wire method with a cupwasher locking method. The introduction of a No.1 bearing outer housing ring is necessary. locking method. The introduction of a No.1 bearing outer housing ring is necessary.

Sep 17/2008

Sep 17/2008 PT6A-72-1668PT6A-72-1668

R

Reevviissiioon n NNoo. . 11: : JJaan n 2266//2200009 9 CCoovveer r SShheeeett

2

244--HHoouur r GGlloobbaal l SSeerrvviicce e UUSSA A & & CCAANNAADDAA...1-800-268-8000 1-800-268-8000 Other...Other...1-450-647-8000 1-450-647-8000

CFIRST CENTRE

CFIRST CENTRE International ...International ...(IAC*)+8000-268-8000 (IAC*)+8000-268-8000 FaxFax...1-450-647-2888 1-450-647-2888 T

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WARNING - PROPRIETARY RIGHTS & EXPORT CONTROLS NOTICE WARNING - PROPRIETARY RIGHTS & EXPORT CONTROLS NOTICE This bulletin contains proprietary information of Pratt & Whitney Canada Corp. (

This bulletin contains proprietary information of Pratt & Whitney Canada Corp. (″ ″ P&WCP&WC″ ″ ), which), which

P&WC provides in confidence and solely for the purposes of supporting engine certification and P&WC provides in confidence and solely for the purposes of supporting engine certification and providing applicable information regarding the proper use, maintenance, inspection, repair, servicing providing applicable information regarding the proper use, maintenance, inspection, repair, servicing and parts application of P&WC products and services, as directed therein. Neither this bulletin nor and parts application of P&WC products and services, as directed therein. Neither this bulletin nor any information in it may be disclosed to others, or used for any other purpose, including, without any information in it may be disclosed to others, or used for any other purpose, including, without limitation, to design, create, develop, reproduce, manufacture or derive any design, part, product, limitation, to design, create, develop, reproduce, manufacture or derive any design, part, product, material, process, modification, configuration change or repair, or obtain FAA or other government material, process, modification, configuration change or repair, or obtain FAA or other government approval to do so. Possession and use of this bulletin is also subject to the restrictions set out in approval to do so. Possession and use of this bulletin is also subject to the restrictions set out in P&WC’s T

P&WC’s Technical Dataechnical DataAgreement (a copy of which may Agreement (a copy of which may be obtained by contacting P&WC Technicbe obtained by contacting P&WC Technicalal Publications). The contents of this bulletin may be subject to export control laws. Unauthorized export Publications). The contents of this bulletin may be subject to export control laws. Unauthorized export or re-export of the bulletin, or parts thereof, is prohibited. By accepting and possessing this bulletin, or re-export of the bulletin, or parts thereof, is prohibited. By accepting and possessing this bulletin, you agree to be bound by the foregoing terms.

you agree to be bound by the foregoing terms.

If a Government agency or department intends to disclose any information, written notice should be If a Government agency or department intends to disclose any information, written notice should be given to:

given to: VP -

VP - Legal ServicLegal Services, Pratt es, Pratt & & WhitneWhitney y CanadCanada a CorpCorp., ., 1000 Marie-V1000 Marie-Victorictorin in (01BE(01BE5), Longueuil5), Longueuil,, Quebec J4G 1A1.

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REVISION TRANSMITTAL SHEET REVISION TRANSMITTAL SHEET TURBOPROP ENGINE MODEL PT6A TURBOPROP ENGINE MODEL PT6A

SUBJE

SUBJECTCT: : Pratt & Whitney Canada ServiPratt & Whitney Canada Service Bulletin No. PT6A-7ce Bulletin No. PT6A-72-1668, Rev2-1668, Rev. No. 1, date. No. 1, dated Jand Jan 26/2009 (P&WC S.B. No. 1668R1) LOCK CUPWASHERS TO THE INLET CASE 26/2009 (P&WC S.B. No. 1668R1) LOCK CUPWASHERS TO THE INLET CASE BOLTS - INTRODUCTION OF

BOLTS - INTRODUCTION OF

Replace your existing copy of this service bulletin with the attached revised bulletin. Destroy the Replace your existing copy of this service bulletin with the attached revised bulletin. Destroy the superseded copy.

superseded copy.

Please retain this Revision Transmittal Sheet with the revised bulletin. Please retain this Revision Transmittal Sheet with the revised bulletin. SUMM

SUMMARYARY: : This servThis service bulletice bulletin is revised to modify the part replain is revised to modify the part replacemencements for the PT6A-6/Pts for the PT6A-6/PT6A-2T6A-200 series.

series.

EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT: EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT: None.

None. NOT

NOTE: E: A blaA black bar in the left marck bar in the left margin indgin indicaicates a changtes a change in e in thathat line of text or ﬁgurt line of text or ﬁgure.e.

REVISION

REVISION HISTORYHISTORY:: Ori

Originginal al IssIssue: ue: Sep Sep 17/17/20082008 Revis

Revision No. ion No. 1: 1: Jan 26/2Jan 26/2009009

Pratt & Whitney Canada Corp. Pratt & Whitney Canada Corp. 1000, Marie-Victorin

1000, Marie-Victorin

Longueuil, Québec, Canada J4G 1A1 Longueuil, Québec, Canada J4G 1A1 Tél. 450-677-9411 Tél. 450-677-9411 26 January 2009 26 January 2009 P&WC S.B. No. 1668R1 P&WC S.B. No. 1668R1

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1.

1. PlaPlanninning ng InfInformormatiationon A.

A. EfEffecfectivtivityity

PT6A-6 Engines. PT6A-6 Engines. PT6A-6A Engines. PT6A-6A Engines. PT6A-6B Engines. PT6A-6B Engines. PT6A-20 Engines. PT6A-20 Engines. PT6A-20A Engines. PT6A-20A Engines. PT6A-20B Engines. PT6A-20B Engines.

PT6A-21 Engines which are before and include Serial No. PCE-PE0682. PT6A-21 Engines which are before and include Serial No. PCE-PE0682. PT6A-25 Engines.

PT6A-25 Engines.

PT6A-25A Engines which are before and include Serial No. PCE-RN003. PT6A-25A Engines which are before and include Serial No. PCE-RN003. PT6A-25C Engines which are before and include Serial No. PCE-PF0062. PT6A-25C Engines which are before and include Serial No. PCE-PF0062. PT6A-27 Engines which are before and include Serial No. PCE-PG0376. PT6A-27 Engines which are before and include Serial No. PCE-PG0376. PT6A-28 Engines.

PT6A-28 Engines.

PT6A-34 Engines which are before and include Serial No. PCE-RB0384. PT6A-34 Engines which are before and include Serial No. PCE-RB0384. PT6A-34AG Engines which are before and include Serial No. PCE-PH0430. PT6A-34AG Engines which are before and include Serial No. PCE-PH0430. PT6A-34B Engines.

PT6A-34B Engines.

PT6A-35 Engines are before and include Serial No. PCE-RR0182. PT6A-35 Engines are before and include Serial No. PCE-RR0182. PT6A-36 Engines.

PT6A-36 Engines. PT6A-114 Engines. PT6A-114 Engines.

PT6A-114A Engines which are before and include Serial No. PCE-PC1517. PT6A-114A Engines which are before and include Serial No. PCE-PC1517. PT6A-135 Engines.

PT6A-135 Engines.

PT6A-135A Engines which are before and include Serial No. PCE-PZ0684 excluding PT6A-135A Engines which are before and include Serial No. PCE-PZ0684 excluding

PZ0680. PZ0680. B.

B. ConConcurcurrenrent t ReqRequiruiremeementsnts None. None. C. C. ReReasasonon (1 (1) ) PrProboblelemm

Attachment of the No.1 bearing housing to the compressor inlet case can be Attachment of the No.1 bearing housing to the compressor inlet case can be difficult and can take a long time to safety with lockwire.

difficult and can take a long time to safety with lockwire. (2

(2) ) CaCaususee

Because of the small accessability to the attaching bolts, the lockwire method used Because of the small accessability to the attaching bolts, the lockwire method used is not the optimum method.

is not the optimum method.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 1668R1 P&WC S.B. No. 1668R1 TURBOPROP ENGINE TURBOPROP ENGINE

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1.

1. PlanniPlanning ng InformInformation ation (Cont(Cont’d)’d) D.

D. DesDescricriptiptionon

Install the new No.1 bearing outer housing ring and attach the inlet case to the No.1 Install the new No.1 bearing outer housing ring and attach the inlet case to the No.1 bearing housing with the new bolts and lock with new cupwashers.

bearing housing with the new bolts and lock with new cupwashers. E.

E. CoCompmplilianancece CA

CATEGORTEGORY Y 7 7 - - YYou can do this serviou can do this service bulletice bulletin when the supply of supn when the supply of supersederseded partsed parts is fully used.

is fully used. F

F. . ApApprprovovalal D.O.T

D.O.T./D.A.A. ./D.A.A. approved.approved. G.

G. WeWeighight t and and BalBalancancee None.

None. H.

H. EleElectrctricaical l LoaLoad d DatDataa Not

Not changechanged.d. I.

I. SofSoftwatware re AccAccompomplislishmehment nt SumSummarmaryy Not applicable.

Not applicable. J.

J. ReRefefererencnceses

Applicable PT6A Technical Manuals Applicable PT6A Technical Manuals

P&WC Consumable Materials List P/N 3043340 P&WC Consumable Materials List P/N 3043340 K.

K. PubPubliclicatiations ons AfAffecfectedted

Applicable PT6A Technical Manuals Applicable PT6A Technical Manuals L.

L. InterInterchangechangeabilitability ay and Ind Intermntermixabilixability ity of of PartsParts Interchangeability - Refer to Para. 2.D.

Interchangeability - Refer to Para. 2.D. Inter

Intermixabmixability - ility - Not Not changechanged.d. 2.

2. MatMaterierial al InfInf atiati

PRATT & WHITNEY CANADA

SERVICE BULLETIN

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Cancel Anytime.

2.

2. MaterMaterial ial InforInformation mation (Cont(Cont’d)’d) B.

B. MatMaterierial - Coal - Cost anst and Ad Avaivailablabiliilityty

You can get the procurable parts listed in Para. 2.D. from any Pratt & Whitney Canada You can get the procurable parts listed in Para. 2.D. from any Pratt & Whitney Canada Parts Distribution Center.

Parts Distribution Center.

The estimated total cost of new parts needed to replace old parts is $414.10 (US, 2009). The estimated total cost of new parts needed to replace old parts is $414.10 (US, 2009). The new parts are scheduled to be available in .

The new parts are scheduled to be available in . C.

C. MaManpnpowowerer

No more man-hours are necessary to include this service bulletin at overhaul. No more man-hours are necessary to include this service bulletin at overhaul. D.

D. MatMaterierial Necal Necessessary foary for Eacr Each Engih Enginene

The quantity of materials listed in this section is on a per Engine basis. The quantity of materials listed in this section is on a per Engine basis.

N Neew w PP//N N KKeeyywwoorrd d OOlld d PP//N N QQttyy Est. Unit Est. Unit List Price List Price ($US, ($US, 2009)

2009) InstructionsInstructionsDispositionDisposition For the PT6A-6, PT6A-6A, PT6A-6B, PT6A-20, PT6A-20A and PT6A-20B Engines:

For the PT6A-6, PT6A-6A, PT6A-6B, PT6A-20, PT6A-20A and PT6A-20B Engines:

W Waasshheer r 3300001155664 4 4 4 ((AA))((BB)) M MSS99888800--009 9 WWaasshheerr, , CCuup p LLoocck k 4 4 55..887 7 ((AA)) M MSS99667766--008 8 BBoolltt, , MMaacchhiinnee, , DDbbl l HHeex x MMSS99116699--006 6 4 4 1188..773 3 ((AA))((BB)) 30 30727259599-9-01 01 RRining, g, NoNo1 1 BeBeararining g OuOutterer 1 1 331155770 0 ((AA))

PRATT & WHITNEY CANADA

SERVICE BULLETIN

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Cancel Anytime.

E.

E. ReiReidendentiﬁtiﬁed ed ParPartsts None.

None. F

F. . TTooling ooling - Pr- Price ice and and AvaiAvailabililabilityty

T

Tooool l NNoo. . NNoommeennccllaattuurree Est. PriceEst. Price(($$UUSS,,) ) DDeelliivveerryy P

PWWCC5500992255--1 1 PPlliieerrs s CCuuppwwaasshheer r QQuuoottee 3.

3. AccomAccomplishplishment ment InstInstructiructionsons A.

A. RemovRemove the parts lie the parts listed undsted under Old P/N coler Old P/N column in Para. 2umn in Para. 2.D., Ma.D., Material Iterial Informnformation. Ration. Referefer to the applicable overhaul manual instructions.

to the applicable overhaul manual instructions. B.

B. InstaInstall the parts lisll the parts listed under New P/N coted under New P/N column in Para. 2.Dlumn in Para. 2.D., Materi., Material Informal Information. Reation. Referfer to the applicable overhaul manual instructions (Ref. 72-30-00 Install Compressor Inlet to the applicable overhaul manual instructions (Ref. 72-30-00 Install Compressor Inlet Case and Fairing) with the diff

Case and Fairing) with the differenceerences that follow (Ref. Fig. s that follow (Ref. Fig. 1):1): (1)

(1) Do the steDo the steps that fops that follow aftllow after you inster you install the comall the compresspressor inlet caor inlet case on the gasse on the gas generator:

generator: (a)

(a) LubricLubricate the threads of four bolts P/N MS9ate the threads of four bolts P/N MS9676-08 with engi676-08 with engine lubricatne lubricating oiling oil (PWC03-001).

(PWC03-001). (b)

(b) Align and instAlign and install the inlet casall the inlet case and the ring P/N 3e and the ring P/N 3072599-072599-01 through th01 through thee threaded dowel.

threaded dowel. (c)

(c) AttacAttach the inlet case and the ring to the No. h the inlet case and the ring to the No. 1 bearing hous1 bearing housing with threing with three boltse bolts P/N MS9676-08 and three cupwashers P/N MS9880-09.

P/N MS9676-08 and three cupwashers P/N MS9880-09.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

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Cancel Anytime. BOLT BOLT P/N MS9676−08 P/N MS9676−08 CUPWASHER CUPWASHER P/N MS9880−09 P/N MS9880−09 No. 1 BEARING No. 1 BEARING OUTER HOUSING OUTER HOUSING RING RING P/N 3072599−01 P/N 3072599−01 COMPRESSOR COMPRESSOR INLET CASE INLET CASE (REF.) (REF.) No.1 BEARING No.1 BEARING HOUSING HOUSING (REF.) (REF.)