# BULLETIN INDEX LOCATOR 

# 72-10-00

TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF
MODEL APPLICATION PW118, PW118A, PW118B, PW119B, PW119C, PW120, PW120A, PW121, PW121A, PW123, PW123B, PW123C, PW123D, PW123E, PW123AF, PW124B, PW125B, PW126, PW126A, PW127, PW127B, PW127E, PW127F, PW127G, PW127H, PW127J, PW127M Compliance: CATEGORY 3 Summary: Two instances of propeller shafts with cracks at the Bearing No. 19 area, were discovered during troubleshooting for oil leakage in the propeller shaft area. The investigation has determined that the crack initiation was resulting from a plating repair not performed in accordance with the current published P&WC Cleaning Inspection and Repair (CIR) Manual. Both propeller shafts found with circumferential crack had been processed consecutively in the past for nickel plating repair. This service bulletin provides instructions to identify the location of repaired propeller shafts where compliance to the nickel plating repair process cannot be ascertained and to inspect these propeller shafts. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

Mar 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 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 PW100

SUBJECT: Pratt & Whitney Canada Service Bulletin No. PW100-72-A21813, Rev. No. 3, dated Mar 21/2012 (P&WC S.B. No. A21813R3) PROPELLER SHAFT - INSPECTION 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 service bulletin is revised to:

v Revise S/N 9M765 to read 9M755 in table 1.

v Revise S/N 7T434 to read 7T343 in table 2.

v Criteria for the repeat inspection modified.

EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT: **Operators that complied with prior revisions must perform repititive inspections within the intervals as specified in Para. 3 C.** 
NOTE: A black bar in the left margin indicates a change in that line of text or figure.

REVISION HISTORY: Original Issue: Mar 08/2012 Revision No. 1: Mar 13/2012 Revision No. 2: Mar 20/2012 Revision No. 3: Mar 21/2012 Pratt & Whitney Canada Corp. 1000, Marie-Victorin Longueuil, Québec, Canada J4G 1A1 Tél. 450-677-9411

21 March 2012

P&WC S.B. No. A21813R31. Planning Information A. Effectivity PW118 Engines PW118A Engines PW118B Engines PW119B Engines PW119C Engines PW120 Engines PW120A Engines PW121 Engines PW121A Engines PW123 Engines PW123AF Engines PW123B Engines PW123C Engines PW123D Engines PW123E Engines PW124B Engines PW125B Engines PW126 Engines PW126A Engines PW127 Engines PW127B Engines PW127E Engines PW127F Engines PW127G Engines PW127H Engines PW127J Engines PW127M Engines NOTE: 1. The applicable propeller shaft serial numbers are listed in Tables 1 and 2. NOTE: 2. Refer to SB 21798 for incorporation requirements. B. Concurrent Requirements P&WC SB 21802 must be done in conjunction with this SB.
C. Reason (1) Problem There were two events where the propeller shaft was found with a circumferential crack at the No. 19 bearing area. This condition was discovered while troubleshooting an oil leak at the propeller shaft seal area. P&WC No. DCR18033 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 1 of 15 © 2012 Pratt & Whitney Canada Corp. PRINTED IN CANADA TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF1. Planning Information (Cont’d) (2) Cause The investigation has determined that the crack initiation resulted from a repair process not consistent with the published P&WC Cleaning, Inspection and Repair (CIR) Manual. (3) Solution Visually inspect the propeller shaft to confirm serial number and inspect the inner bore for crack. D. Description This service bulletin provides instructions to identify the location of repaired propeller shafts for which compliance to the nickel plating repair process cannot be ascertained and to inspect for crack the inner bore of the propeller shafts identified in Tables 1 and 2 per the specified limits and repeat intervals. E. Compliance CATEGORY 3 - P&WC recommends to do this service bulletin within 150 flight hours (EFH) or no later than April 30th, 2012. F. Approval D.A.A. approved G. Manpower No more man-hours are necessary to include this service bulletin at overhaul. H. Weight and Balance None. I. Electrical Load Data Not changed. J. Software Accomplishment Summary Not changed. K. References Illustrated Parts Catalog P/N 3034624 (PW118/118A/118B) 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 2 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF1. Planning Information (Cont’d)
Illustrated Parts Catalog P/N 3038534 (PW119B/119C) Illustrated Parts Catalog P/N 3034644 (PW120/121/121A) Illustrated Parts Catalog P/N 3034634 (PW120A/121) Illustrated Parts Catalog P/N 3036434 (PW123/123B/123C/123D/123E) Illustrated Parts Catalog P/N 3034540 (PW123AF) Illustrated Parts Catalog P/N 3037334 (PW124B/127/127E/127F/127M) Illustrated Parts Catalog P/N 3034934 (PW125B) Illustrated Parts Catalog P/N 3039724 (PW127B) Illustrated Parts Catalog P/N 3034924 (PW126/126A) Illustrated Parts Catalog P/N 3044824 (PW127G) Illustrated Parts Catalog P/N 3045544 ( PW127H) Illustrated Parts Catalog P/N 3043394 (PW127J) Overhaul Manual P/N 3034623 (PW118/118A/118B) Overhaul Manual P/N 3034643 (PW120/121/121A) Overhaul Manual P/N 3034633 (PW120A/121) Overhaul Manual P/N 3036433 (PW123/123B/123C/123D/123E) Overhaul Manual P/N 3034539 (PW123AF) Overhaul Manual P/N 3037333 (PW124B/127/127E/127F/127M) Overhaul Manual P/N 3034933 (PW125B/PW127B) Overhaul Manual P/N 3034923 (PW126/126A) Overhaul Manual P/N 3044823 (PW127G) Overhaul Manual P/N 3045543 ( PW127H) Overhaul Manual P/N 3043393 (PW127J) Engine Manual P/N 3038533 (PW119B/119C) P&WC S.B. No. 21802 P&WC S.B. No. 21798 Special Instruction No. 22-2012 Special Instruction No. 38-2011 Service Information Letter No. PW100-141
L. Publications Affected
None. M. Interchangeability and Intermixability of Parts Not applicable.
2. Material Information A. Industry Support Information Not applicable. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 3 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF2. Material Information (Cont’d) B. Material - Cost and Availability Not applicable. C. Material Necessary for Each Engine Not applicable. D. Reidentified Parts None. E. Tooling - Price and Availability Not applicable. 3. Accomplishment Instructions NOTE: Refer to the latest revision of SIL PW100-141 for additional background information on this propeller shaft replacement. A. Review engine records for RGB in your fleet to determine if a shaft S/N listed in Tables 1 and 2 is installed. NOTE: 1. You may determine the propeller shafts S/N by verifying the RGB maintenance record or by reading the serial number directly from the outside diameter of the propeller shaft flange (Ref. Fig. 1) or by contacting the repair facility that performed the last RGB shop visit. NOTE: 2. If you cannot determine with certainty the S/N of the shaft, installed in any one RGB, by reviewing the records, you must visually verify the propeller shaft S/N on the outside diameter of the propeller shaft flange (Ref. Fig. 1). B. If a propeller shaft, listed in Tables 1 or 2, is in your fleet, complete the record sheet attached (Ref. Fig. 2) for each RGB where these shafts are located and send to the following dedicated e-mail address: gp.pwc.regional.turboprop@pwc.ca. C. If the propeller shaft is listed in table 1 or table 2, inspect the inner bore area b (Ref figure 1) for crack within 50 flight hours (EFH) by visual inspection or by an ultrasonic inspection. NOTE: Inspection intervals depends on the method used. You may elect to change from one to the other provided that the repeat intervals are met. (1) For visual inspection, remove the propeller or remove the propeller pitch change actuator per the AMM to access the inside diameter of the propeller shaft and visually inspect area b (Ref. Figure 1) for visible crack and/or obvious damage. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 4 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF3. Accomplishment Instructions (Cont’d) (a) Perform a repeat visual inspection within 50 EFH and repeat within every 10 EFH intervals thereafter until the propeller shaft is replaced per SB 21798. (b) Report findings to P&WC (Ref. Fig. 2) (2) For ultrasonic inspection, remove the propeller and inspect the propeller shaft for crack in accordance with SI 22-2012. NOTE: 1. Ultrasonic inspection per SI 22-2012 can be accomplished only by personnel certified to a Level II for ultrasonic inspection in accordance with NAS 410 or an equivalent internationally recognized certification; provided that they have successfully completed specific training from a trainer approved by P&WC. NOTE: 2. Contact your local Field service Representative (FSR) to coordinate the logistic to proceed with the ultrasonic inspection. You may also contact P&WC at e-mail: regional.turboprop@pwc.ca for assistance. (a) Repeat the ultrasonic inspection at interval not to exceed 1000 EFH until the propeller shaft is replaced per SB 21798. D. If a crack is found, replace the propeller shaft prior to next flight. E. Write accomplishment of P&WC SB No. 21813. 4. Appendix A. Refer to Tables 1 and 2 for Propeller Shaft S/N. NOTE: 1. The propeller shaft part numbers in Tables 1 and 2 are provided for reference only since the part number may be different due to subsequent modifications. It is the S/N that requires verification as it remains unchanged. NOTE: 2. P&WC does not have a complete record of the current RGB serial numbers in which propeller shafts, listed in Tables 1 and 2, may be installed. TABLE 1, Propeller Shaft Replacement (listed by Shaft S/N)

Shaft S/N Shaft P/N

12A686 3115424-01 12A689* 3115424-01 14A317 3115424-01 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 5 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 1, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

14A318 3115424-01 14A319 3115424-01 14A768* 3111625-01 15A999* 3115424-01 1N602* 3111625-01 1X340 3115424-01 1X342* 3115424-01 1X343 3115424-01 1X347 3115424-01 23A807 3111625-01 25A597 3115424-01 4T382 3111625-01 4X663 3115424-01 4X665 3115424-01 4X667 3115424-01 4X674 3115424-01 5N251* 3111625-01 6W387 3111625-01 6W668 3111625-01 6X229 3115424-01 6X240* 3115424-01 6X245* 3115424-01 6X248 3115424-01 6Y192 3115424-01 6Y198 3115424-01 6Y209 3115424-01 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 6 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 1, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

6Y228* 3115424-01 7T116* 3111625-01 7W762 3115424-01 7W935* 01R3045522-01 7W938 3111625-01 7Y416 3115424-01 7Y420 3115424-01 7Y422* 3115424-01 9M755 3045522-01 9Y857 3115424-01 A0000278 3115424-02 A00003AT 3115424-02 A0009PKC 3045522-01 A0015HH9* 3045522-01 EAAA000E990 3045522-01 Note 1 : * Propeller shaft already removed from service. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 7 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N)

Shaft S/N Shaft P/N 0000D80 3123342-01 000BAK7 01R3123342-01

10A284 3111627-01 10A349 31111 19-02 13A023 3111625-02 13A071 01R3045521-01 13A075 01R3123342-01 14A753* 3119949-02 14A754* 3119949-02 15A811 3113660-01 18A131 3111627-01 1K018* 3038805 1N100 3111625-02 1N586 3 1111 19-02 1T825* 3 1111 19-02 1W758 3111625-02 1X016* 3 1111 19-02 1X101 3111627-01 22A224* 31111 19-02 23A642 3111627-01 25A650 3123342-01 25A669* 3123342-01 25A681 3123342-01 25A732 3123342-01 25A924 3123342-01 25A925 3123342-01 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 8 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

25A991 3123342-01 26A119 01R3123342-01 26A386 3123342-01 2N202 3111627-01 2N215 3 1111 19-02 2N240* 3 1111 19-02 2P161 3 1111 19-02 2P805* 3 1111 19-02 2P819 3 1111 19-02 2T125 31111 19-02 2T133 31111 19-02 2T150 01R3123342-01 2T188 3111625-02 2T818 31111 19-02 2T834 31111 19-02 2T974 31111 19-01 2X264 3 1111 19-02 2X326 3 1111 19-02 2X354 3 1111 19-02 2X357 3 1111 19-02 3L509* 3038805 3L957 3038805 3M656 3 1111 19-01 3M773 3 1111 19-02 3R728 3 1111 19-02 3R738 3 1111 19-02 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 9 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

3R746 3 1111 19-02 3R832* 3 1111 19-01 3R834 3 1111 19-01 3R853 3 1111 19-03 4T525 31111 19-02 4T538 31111 19-01 4T641 3111627-01 4T709* 3 1111 19-02 4T764 3111627-01 4X411 3 1111 19-02 4X413* 3 1111 19-02 4X416 3 1111 19-02 4X499 3 1111 19-02 55A420 3123342-01 5L684 3107036-02 5L693 3107036-02 5L694 3038805 5L754 3038805 5L876 3107036-02 5N755 3 1111 19-02 5N787 3 1111 19-02 5N809 3 1111 19-01 5X683 3 1111 19-02 5X699 3 1111 19-02 69A819 3123342-01 6L444* 3 1111 19-02 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 10 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

6L451 3 1111 19-02 6T750 31111 19-02 6T969 31111 19-02 6T970 31111 19-02 6T973* 3 1111 19-02 6T977 31111 19-02 6T984 31111 19-02 6W520 3113660-01 6W688 3111625-02 6X616 3 1111 19-02 6X618 3 1111 19-02 6X631 3111625-02 6Y628 3111627-01 7A173 3123342-01 7T425 31111 19-02 7T343 31111 19-02 7W396 3 1111 19-02 7W497 3 1111 19-01 7W500 3 1111 19-02 8K307* 3107036-02 8K505 3038805 8M810 3 1111 19-01 8M817* 01R3123342-01 8M818 3 1111 19-03 8W093 3 1111 19-01 8W191* 31111 19-02 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 11 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N

8W201 3111625-02 8W646 3 1111 19-02 8W647 3 1111 19-02 8X100 3 1111 19-03 8Y281 3 1111 19-02 8Y671 3113660-01 9K436 3107036-02 9K947* 3107036-02 9L555 3 1111 19-02 9P949* 3 1111 19-02 9P957 3 1111 19-02 9W711 3111627-01 9W738* 3 1111 19-02 A00000DM 3123342-01 A00000DR* 3123342-01 A00000LC 3123342-01 A0000166 3123342-01 A0000168 01R3123342-01 A0000K57 3045522-02 A0001X11 3119949-02 A0002LK8 3119949-02 A0003RYA 3045519-01 A00058AX 01R3123342-01 A0005P57 3123342-01 A0005P5E 3123342-02 A0006RCB 3123342-01 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 12 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF4. Appendix (Cont’d) TABLE 2, Propeller Shaft Replacement (listed by Shaft S/N) (Cont’d) Shaft S/N Shaft P/N A001081K* 01R3123342-01 A001277P 3123342-01 A0012CK4 3123342-01 A0014B54 01R3123342-01 EAAA000M662 3045522-02 Note 1 : * Propeller shaft already removed from service. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 13 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF**S/N MARKING LOCATION** 



## B

**TYPICAL**

C195776 Propeller Shaft S/N - Marking Location Figure 1 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 14 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF**OPERATOR / COMPANY NAME: PHYSICAL ADDRESS:**  **CITY: ZIP CODE:**  **COUNTRY: CONTACT PERSON FULL NAME:**  **TITLE: PHONE NUMBER:** 

**RESULT OF PROP SHAFT BORE INSPECTION:** 

**RGB S/N PROP SHAFT**  **P/N PROP SHAFT**  **S/N RGB TSO or**  **SINCE LAST REPAIR NAME OF SHOP THAT**  **PERFORMED LAST RGB SHOP VISIT**  **EXPECTED DATE OF**

**NEXT SHOP VISIT**

**Send the completed form to the following e−mail address: regional.turboprop@pwc.ca**

**E−MAIL ADDRESS:**

C196386 Record Sheet Figure 2 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A21813R3

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 08/2012 **PW100-72-A21813** Revision No. 3: Mar 21/2012 Page 15 of 15 TURBOPROP ENGINE PROPELLER SHAFT - INSPECTION OF