# 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

24-Hour Global Service USA & CANADA........................ **1-800-268-8000** Other .......................................... **1-450-647-8000** 

### CFIRST CENTRE International .................... **(IAC*)+8000-268-8000** Fax ............................................. **1-450-647-2888** Toll free where available (SIL GEN-027) * International Access Code Web Site .................................. **www.pwc.ca**WARNING - PROPRIETARY RIGHTS & EXPORT CONTROLS NOTICE This bulletin contains proprietary information of Pratt & Whitney Canada Corp. (′′P&WC′′), which 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 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, 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 P&WC’s Technical Data Agreement (a copy of which may be obtained by contacting P&WC Technical 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, you agree to be bound by the foregoing terms. If a Government agency or department intends to disclose any information, written notice should be given to: VP - Legal Services, Pratt & Whitney Canada Corp., 1000 Marie-Victorin (01BE5), Longueuil, Quebec J4G 1A1.

**Export Control Classification** *Data is subject to the jurisdiction of the Export and Import Controls Bureau of the Department of Foreign Affairs and International Trade of Canada, Department of Commerce of the United States and/or Department of State of the United States. ** Data is not subject to the jurisdiction of the Department of Commerce of the United States or Department of State of the United States but would become subject if exposed to any US involvement. **Regulation Classification Number**  Canadian ECL(s)* ECCN(s)* P-ECCN(s)** 9E991 USML (ITAR)* P-USML**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. 35274R11. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **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 OF1. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **PW150-72-35274** Revision No. 1: May 03/2012 Page 2 of 10 TURBOPROP ENGINE IGNITER CABLE - RE-ROUTING OF2. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **PW150-72-35274** Revision No. 1: May 03/2012 Page 3 of 10 TURBOPROP ENGINE IGNITER CABLE - RE-ROUTING OF2. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **PW150-72-35274** Revision No. 1: May 03/2012 Page 4 of 10 TURBOPROP ENGINE IGNITER CABLE - RE-ROUTING OF3. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **PW150-72-35274** Revision No. 1: May 03/2012 Page 5 of 10 TURBOPROP ENGINE IGNITER CABLE - RE-ROUTING OF3. 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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **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 **C CLAMP (REF.)**  **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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **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 The export control classification with respect to this document is contained on the back of the locator. Mar 23/2012 **PW150-72-35274** Revision No. 1: May 03/2012 Page 10 of 10 TURBOPROP ENGINE IGNITER CABLE - RE-ROUTING OF