BULLETIN INDEX LOCATOR

74-21-00

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF

MODEL APPLICATION

PW150A

Compliance: CATEGORY 5

Summary: There can be a chafing between the igniter cable and flowmeter to flow divider fuel

tube as well as the oil pump housing. This is due to the small clearance between the

igniter cable and the adjacent hardware.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

Mar 23/2012 PW150-72-35274

Revision No. 1: May 03/2012 Cover Sheet

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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

and parts application of P&WC products and services, as directed therein. Neither this bulletin nor

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Quebec J4G 1A1.

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of the United States and/or Department of State of the

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Regulation Classification

Number

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ECCN(s)*

P-ECCN(s)** 9E991

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REVISION TRANSMITTAL SHEET

TURBOPROP ENGINE MODEL PW150

SUBJECT: Pratt & Whitney Canada Service Bulletin No. PW150-72-35274, Rev. No. 1 dated May

03/2012 (P&WC S.B. No. 35274R1) IGNITER CABLE - RE-ROUTING OF

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

superseded copy.

Please retain this Revision Transmittal Sheet with the revised bulletin.

SUMMARY:

This revision is issued to

(1) Modify the Concurrent Requirements Para.

EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT:

None.

REVISION HISTORY:

Original Issue: Mar 23/2012

Revision No. 1: May 03/2012

Pratt & Whitney Canada Corp.

1000, Marie-Victorin

Longueuil, Québec, Canada J4G 1A1

Tél. 450-677-9411

May 03/2012

P&WC S.B. No. 35274R1

1. Planning Information

A. Effectivity

PW150A Engines which are before and include Serial No. PCE-FA0916.

B. Concurrent Requirements

This service bulletin supersedes P&WC SB No. 35251.

C. Reason

(1) Problem

There can be a chafing between the igniter cable and flowmeter to flow divider fuel

tube as well as the oil pump housing.

(2) Cause

The small clearance between the igniter cable and the adjacent hardware.

(3) Solution

To prevent from chafing, the ignitor cable is re-routed. It requires the introduction of

a new support bracket with additional clamping points.

D. Description

Introduce new clamping points on the igniter cables to prevent chafing.

E. Compliance

CATEGORY 5 - P&WC recommends to do this service bulletin when the engine is

disassembled and access is available to the necessary subassembly

(i.e. module, accessories, components, or build groups). Do all spare

subassemblies.

F. Approval

D.O.T./D.A.A . Approved.

G. Manpower

Once you have access to the part, an estimate of 1.0 man-hours is required to include

this service bulletin at repair.

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

P&WC No. E5442B

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 1 of 10 © 2012 Pratt & Whitney Canada Corp.

PRINTED IN CANADA

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
1. Planning Information (Cont’d)

H. Weight and Balance

The engine weight will increase by 0.19 pounds (0.09 kgs).

The effect of the weight change on the engine center of gravity is negligible.

I. Electrical Load Data

Not applicable.

J. Software Accomplishment Summary

Not applicable.

K. References

Maintenance Procedures (From BRAD AMM)) P/N 3043522

Engine Manual (EM) (Overhaul Manual) P/N 3043523

Engine Illustrated Parts Catalog (EIPC) P/N 3043524

L. Publications Affected

Maintenance Procedures (From BRAD AMM)) P/N 3043522

Engine Manual (EM) (Overhaul Manual) P/N 3043523

Engine Illustrated Parts Catalog (EIPC) P/N 3043524

M. Interchangeability and Intermixability of Parts

Interchangeability - Refer to Para. 2.C.

Intermixability - Not changed.

2. Material Information

A. Industry Support Information

Not applicable.

B. Material - Price and Availability

You can get the procurable parts listed in Para. 2.C. from any Pratt & Whitney Canada

Parts Distribution Center.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 2 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
2. Material Information (Cont’d)

The estimated total cost of new parts needed to replace old parts is 682.14 (US, 2012).

The new parts will be available in April 2012.

C. Material Necessary for Each Engine

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

New P/N Keyword Old P/N Qty

Est. Unit

List Price

($US,

2012)

Instructions

Dispositions

Bracket, Double Angle,

0.190 Bolt

3106224-01 1 (B)

MS9592-384 Bracket, 90 Deg. Angle,

0.190 Bolt

2 15.26 (A)

ST2231-07 Clamp, Loop, Cushion,

0.438

2 20.80 (A)

MS9556-06 Bolt, Mach, DBL Hex 2 4.74 (A)

ST3030-09 Nut Option (IC) 2 4.47 (A)

3077455-01 Bracket, Support, Igniter

Cable

1 160.00 (A)

Clamp, Quick Release,

Single

ST3369-02 1 (B)

ST3370-02 Clamp, Quick Release,

Double

1 216.20 (A)

Grommet, Rubber, Groove,

0.4375 X 0.625

ST3411-07 1 (B)

ST3411-07 Grommet, Rubber, Groove,

0.4375 X 0.625

2 84.83 (A)

MS9592-174 Bracket, 90 Deg. Angle,

0.190 Bolt

MS9592-014 1 45.74 (A)(B)

(A) RESTRICTED INTERCHANGEABILITY - (ATA 200 Explanation Code 07): All the old parts

must be replaced by all the new parts as an assembly.

(B) Discard the part if it is unserviceable. Return a serviceable part to stock.

D. Reidentified Parts

None.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 3 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
2. Material Information (Cont’d)

E. Tooling - Price and Availability

Not Applicable

3. Accomplishment Instructions

A. Remove the parts listed under the Old P/N column in Para. 2.C., Material Information

(Ref. PW150A Engine Manual P/N 3043523, Subtask 72-00-00-050-032).

B. Install the ignition cables with the revised routing as follows (Ref. Figure 1):

(1) Install the ignition cables in the correct position on the engine. Torque the coupling

nuts by hand.

(2) Install grommets P/N ST3411-07 (Ref.) on the ignition cables at the first two clamp

locations and install the first two quick-release double clamps P/N ST3370-02 (Ref.)

(Ref. Figure 1 Sheet 1).

NOTE: Install the cut of the grommet to point to the bottom of the clip, approximately

180 degrees from the clip opening.

(3) Install the clamps with bolts P/N MS9696-06 (Ref.). Torque the bolt by hand.

(4) On the first two double clamps, push down and turn the clamp bolt heads clockwise

to tighten the clamps.

(5) Install grommets P/N ST3411-07 (Ref.) on the ignition cables at the next two clamp

locations (Ref. Figure 1 Sheet 2).

(6) Install a double clamp P/N ST3426-10 (Ref.), new bracket P/N 3077455-01 and bolt

P/N MS9696-06 (Ref.) on the oil filter housing. Torque the bolt by hand.

(7) Install the cables with grommets in the double clamp P/N ST3426-10 (Ref.) on the

oil filter housing.

(8) Install the new bracket in the hole in the oil filter housing bracket and secure with a

bolt P/N MS9696-12 (Ref.) and a nut ST3030-09 (Ref.). Torque the bolt by hand.

(9) Install the new double quick-release clamp P/N ST3370-02 on the new bracket P/N

3077455-01 and secure with bolt P/N MS9696-06 and nut P/N ST3030-09. Torque

the nut, 36 to 40 lbf.in. (4.1-4.5 Nm).

(10) Install the cables with grommets in the new double quick-release clamp and push

down and turn the clamp bolt head clockwise to tighten the clamp.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 4 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
3. Accomplishment Instructions (Cont’d)

(11) Install the next double quick-release clamp P/N ST3370-02 (Ref.), bolt P/N

MS9696-12 (Ref.) and spacer P/N ST3596-10 (Ref.). Torque the bolt by hand.

(12) Push down and turn the clamp bolt head clockwise to tighten the clamp.

(13) Install new bracket P/N MS9592-384 on the stud and secure with nut P/N ST3030-09

(Ref.). Torque the nut 36 to 40 lbf.in. (4.1-4.5 Nm) (Ref. Figure 1 Sheet 3).

(14) Install double quick-release clamp P/N ST3370-02 (Ref.) on the new bracket with

bolt P/N MS9696-06 (Ref.) and nut P/N ST3030-09 (Ref.). Torque the bolt by hand.

(15) Install grommets P/N ST3411-07 (Ref.) on the ignition cables at the clamp and install

the cables in the clamp. Push down and turn the clamp bolt head clockwise to

tighten the clamp.

(16) Install new bracket P/N MS9592-384 on the existing bracket under the flowmeter to

flow divider tube clamp. Install the flowmeter to flow divider tube clamp over the

new bracket P/N MS9592-384 and secure with bolt P/N MS9696-06 and nut P/N

ST3030-09 (Ref.). Torque the nut 36 to 40 lbf.in. (4.1-4.5 Nm).

(17) Install the grommet P/N ST3411-07 on the right ignition cable and install in clamp

P/N ST3369-02 (Ref.).

(18) Install the clamp on the bracket (Ref.) and secure with bolt P/N MS9556-06 (Ref.).

Torque nut by hand.

(19) Install the grommet P/N ST3411-07 on the right ignition cable and install in clamp

P/N ST3325-10 (Ref.).

(20) Install the clamp P/N ST3705-10 (Ref.) on the bracket (Ref.) and secure with bolt

P/N MS9556-06 (Ref.). Torque nut by hand.

(21) Install new bracket P/N MS9592-174 as shown and secure with bolt P/N MS9696-06

(Ref.) and nut P/N ST3030-09 (Ref.). Torque the nutt 36 to 40 lbf. in. (4.1-4.5 Nm).

(22) Install the new clamp P/N ST2231-07 on the left ignition cable and install the clamp

on the new bracket P/N MS9592-384 and secure with bolt P/N MS9556-06 (Ref.)

and nut ST3030-09 (Ref.). Torque nut by hand. (Ref. Figure 1 Sheet 4)

(23) Adjust the positioning of the ignition cables in the clamps as required to ensure

adequate clearance all along the cables.

(24) Torque the all the clamp bolts P/N MS9696-06 and P/N MS9696-12 to 36 to 40 lbf.

in. (4.1-4.5 Nm).

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 5 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
3. Accomplishment Instructions (Cont’d)

(25) Verify that all the quick-release clamp bolt heads are tight.

(26) For Pre-SB 35140 engines, torque the ignition cable coupling nuts at the exciter,

180 to 220 lbf.in. (21-24 Nm) and torque the ignition cable coupling nuts at the

ignitors, 375 to 425 lbf.in. (43-48 Nm) (Ref. Engine Manual P/N 3043523,

72-00-00-02, Task 72-00-00-450-802).

CAUTION: FOR THE RIGHT HAND CABLE, MAKE SURE THE CABLE REMAINS

INSTALLED PARALLEL TO THE GAS GENERATOR CASE. IF THE CABLE

IS PERMITTED TO LOOP UP TOO FAR TOWARDS THE OUTSIDE OF

THE ENGINE, THE CABLE CAN WEAR THE AIRCRAFT P2.7 BLEED VALVE

DUCT.

(27) For Post-SB 35140 engines, torque the ignition cable coupling nuts at the exciter

140 to 160 lbf. in. (15.9-18 Nm) and torque the ignition cable coupling nuts at the

ignitors 240 to 260 lbf.in. (27.2-29.3 Nm) (Ref. Engine Manual P/N 3043523,

72-00-00-02, Task 72-00-00-450-802).

C. Write accomplishment of P&WC S.B. No. 35274 in the applicable engine module log

book.

4. Appendix

Not applicable.

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 6 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
FWD

GROMMET

P/N ST3411−07 (QTY. 2)

(REF.)

BOLT

P/N MS9696−06

(REF.)

DOUBLE CLAMP

P/N ST3370−02

(REF.)

GROMMET

P/N ST3411−07 (QTY. 2)

(REF.)

BOLT

P/N MS9696−06

(REF.)

DOUBLE CLAMP

P/N ST3370−02

(REF.)

DETAIL A

A

C195064

Rerouting of the Ignition cables

Figure 1 (Sheet 1 of 4)

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 7 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
FWD

B

VIEW B

BOLT (REF.)

P/N MS9696−06

SPACER (REF.)

P/N ST3596−10

BOLT (REF.)

P/N MS9696−12

BOLT

P/N MS9696−06

GROMMET (REF.)

P/N ST3411−07 (QTY. 2)

BOLT (REF.)

P/N MS9696−06

DOUBLE CLAMP (REF.)

P/N ST3426−10

NUT

ST3030−09

GROMMET 

P/N ST3411−07 (QTY. 2)

DOUBLE CLAMP 

P/N ST3370−02

BRACKET

P/N 3077455−01

GROMMET (REF.)

P/N ST3411−07

(QTY. 2)

DOUBLE CLAMP (REF.)

P/N ST3370−02

C195272

Rerouting of the Ignition cables

Figure 1 (Sheet 2)

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 8 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
FWD

GROMMET (REF.)

P/N ST3411−07 (QTY. 2)

DOUBLE CLAMP (REF.)

P/N ST3370−02

NUT (REF.)

P/N ST3030−09

P/N ST3030−09

BOLT

P/N MS9696−06

BRACKET

P/N MS9592−384

CLAMP (REF.)

P/N ST2231−07

NUT (REF.)

P/N ST3030−09

NUT (REF.)

BOLT (REF.)

P/N MS9696−06

P/N MS9592−384

BRACKET

VIEW C

CLAMP (REF.) C P/N ST3325−10

BOLT (REF.)

P/N MS9696−06

GROMMET (REF.)

P/N ST3411−07

BOLT

P/N MS9696−06

CLAMP (REF.)

P/N ST3369−02

GROMMET (REF.)

P/N ST3411−07

C195306

Rerouting of the Ignition cables

Figure 1 (Sheet 3)

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 9 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF
FWD

BOLT

P/N MS9696−06

(REF.)

BOLT

P/N MS9696−06

(REF.)

VIEW D

D

BRACKET

P/N MS9592−174

CLAMP

P/N ST2231−07

NUT

P/N ST3030−09

(REF.)

C195273

Rerouting of the Ignition cables

Figure 1 (Sheet 4)

PRATT & WHITNEY CANADA

SERVICE BULLETIN

P&WC S.B. No. 35274R1

P&WC Proprietary Information. Subject to the restrictions on the back of the locator

Mar 23/2012 The export control classification with respect to this document is contained on the back of the locator. PW150-72-35274

Revision No. 1: May 03/2012 Page 10 of 10

TURBOPROP ENGINE

IGNITER CABLE - RE-ROUTING OF