# BULLETIN INDEX LOCATOR 

# 72-51-03

TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF MODEL APPLICATION PW206B, PW206B2, PW206C, PW207C, PW207D, PW207D1, PW207D2, PW207E, PW207K Compliance: CATEGORY 3, 4 Summary: Power Turbine (PT) disks made to certain heat codes and installed in a particular turbomachinery assembly do not meet the maximum recommended service life. The PT disk service life is reduced when operating in a particular temperature and speed environment for engines using a specific vane match. Reidentify PT disks with specific heat code and serial number to a new part number which has a reduced maximum recommended service life allocated for all turbomachinery assembly applications. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

Mar 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 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 TURBOSHAFT ENGINE MODEL PW200

SUBJECT: Pratt & Whitney Canada Service Bulletin No. PW200-72-A28311, Rev. No. 2, dated Jul 24/2012 (P&WC S.B. No. A28311R2) PT DISK - INSPECTION/REIDENTIFICATION 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 remove:

v ‘‘Balancing Assembly’’ from title of Service Bulletin to read ‘‘PT Disk - Inspection/Reidentification of’’, and

v ‘‘balancing assembly’’ from NOTE 2 of the Effectivity in para. 1.A. to read ‘‘....reidentify PT disk in accordance with....’’.

EFFECT OF REVISION ON PRIOR ACCOMPLISHMENT: None.
NOTE: A black bar in the left margin indicates a change in that line of text or figure.

REVISION HISTORY: Original Issue: Mar 01/2012 Revision No. 1: Mar 22/2012 Revision No. 2: Jul 24/2012 Pratt & Whitney Canada Corp. 1000, Marie-Victorin Longueuil, Québec, Canada J4G 1A1 Tél. 450-677-9411

24 July 2012
P&WC S.B. No. A28311R21. Planning Information A. Effectivity PW206B Engines which are before and include Serial No. PCE-BB0126. PW206B2 Engines which are before and include Serial No. PCE-BJ1120. PW206C Engines which are before and include Serial No. PCE-BC0906. PW207C Engines which are before and include Serial No. PCE-BH0611. PW207D Engines which are before and include Serial No. PCE-BF0206. PW207D1 Engines which are before and include Serial No. PCE-BL0203. PW207D2 Engines which are before and include Serial No. PCE-BN0019. PW207E Engines which are before and include Serial No. PCE-BG0165. PW207K Engines which are before and include Serial No. PCE-BK0085. NOTE: 1. The above effectivity list does not identify engines that have been converted from one engine model to another via an engine conversion service bulletin. To clarify the effectivity of converted engines, refer to the original engine effectivity above. For the parts embodied during the engine conversion, refer to conversion service bulletin. NOTE: 2. For spare PT disks P/N 3044188-01 received prior to issue date of this service bulletin, check spares for PT disk heat code and serial number listed in Table 1 and reidentify PT disk in accordance with this service bulletin. B. Concurrent Requirements None. C. Reason (1) Problem Power Turbine (PT) disks made to certain heat codes and installed in a particular turbomachinery assembly do not meet the maximum recommended service life. (2) Cause Stress analysis showed that the mechanical properties of the PT disks made from the drop hammer press forging method are not sufficient to meet the maximum recommended service life when operating in a particular temperature and speed environment for engines using a specific vane match. (3) Solution PT disks with specific heat code and serial number must be reidentified to a new part number. These disks have a reduced maximum recommended service life allocated for all turbomachinery assembly applications. P&WC No. D7169A, D7169C 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 1 of 8 © 2012 Pratt & Whitney Canada Corp. PRINTED IN CANADA TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF1. Planning Information (Cont’d) D. Description Do a one time inspection of the PT disk for heat code and serial number. Reidentify affected disks and replace as necessary in accordance with the accomplishment instructions. E. Compliance **PART A** CATEGORY 3 - P&WC recommends that all engines be inspected within 6 months for PT disk P/N 3044188-01 with heat code and serial number listed in Table 1. **PART B Turbomachinery Assembly P/N 3058588 (Class 5 CT Vane) and PT disk**  **P/N 3044188-01 with heat code and serial number listed in Table 1:** CATEGORY 3 - Re-identify PT disk P/N 3044188-01 within 10,000 cycles or replace as necessary. NOTE: The part number of the Turbomachinery Assembly can be found at the power section on the engine data plate. **PART B Turbomachinery Assembly other than P/N 3058588 (Class 5 CT Vane) and PT disk**  **P/N 3044188-01 with heat code and serial number listed in Table 1:** CATEGORY 4 - Reidentify the PT disk P/N 3044188-01 the first time the engine or module is at a maintenance base that can do the procedure, regardless of the scheduled maintenance action or reason for engine removal, or replace the disk as necessary. NOTE: The part number of the Turbomachinery Assembly can be found at the power section on the engine data plate. F. Approval D.O.T./D.A.A. approved. G. Manpower Estimate of 4.0 man-hours required to include this service bulletin at heavy maintenance. No more man-hours are necessary to include this service bulletin at overhaul. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 2 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF1. Planning Information (Cont’d) H. Weight and Balance None. I. Electrical Load Data Not changed. J. Software Accomplishment Summary Not changed. K. References Applicable Maintenance Manual Applicable Overhaul Manual L. Publications Affected Applicable Illustrated Parts Catalog Applicable Maintenance Manual M. Interchangeability and Intermixability of Parts Interchangeability - Refer to Para. 2.D. Intermixability - Not changed. 2. Material Information A. Industry Support Information Not applicable. B. Material - Cost and Availability Not applicable. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 3 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OFC. 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 Disposition 3075057-01 Disk Balancing Assy, Power Turbine 3044246-01 Ref. NA (A)(B)
3072542-01 Ê Disk, Power Turbine 3044188-01 Rwk NA (A)(C) (A) TWO WAY INTERCHANGEABLE - (ATA 200 Explanation Code 02): The old or the new part can replace the old or the new part. (B) P/N 3075057-01 is provided for reference only and is not procurable. (C) See accomplishment instructions.
D. Reidentified Parts The following list of parts can be reworked: OLD P/N NEW P/N P&WC P/N 3044188-01 P&WC P/N 3072542-01 E. Tooling - Price and Availability Not applicable. 3. Accomplishment Instructions A. PART A (1) Inspect the engine logbook and all spares for PT disk P/N 3044188-01 with heat code and serial number listed in Table 1. (2) If you have PT disk P/N 3044188-01 with heat code and serial number listed in Table 1, refer to 1.E (PART B) to determine compliance requirement before reidentifying or replacing PT disk in accordance with 3.B (PART B). (3) If you do not have PT disk P/N 3044188-01 with heat code and serial number listed in Table 1, you have complied with the intent of this service bulletin. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 4 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF3. Accomplishment Instructions (Cont’d)
B. PART B (1) For PT disk P/N 3044188-01 with heat code and serial number listed in Table 1, do as follows: (a) You can re-identify the PT disk if it has less than 10,000 cycles (Ref. Maintenance Manual, Airworthiness Limitations) otherwise replace the disk in accordance with the applicable maintenance or overhaul manual. NOTE: If re-identifying the disk, do not touch the disk heat code or serial number. Make sure the old part number on the disk is not legible. (b) To reidentify PT disk, use one of the methods that follow: 1 DOT Peening. **WARNING:** USE EYE PROTECTION WHEN YOU WRITE WITH THE DOT PEENING PROCEDURE. a Use DOT peening procedure, 0.003 in. (0.08 mm) deep maximum, and put lines or ‘‘X’’ characters thru the old part number. b Use DOT peening procedure, 0.003 in. (0.08 mm) deep maximum, and write the new part number in the location shown in Figure 1. 2 Electrolytic Etch, Deep **CAUTION:** MAKE SURE THAT THE REMAINING ELECTROLYTE (ETCH SOLUTION) IS FULLY NEUTRAL AFTER YOU WRITE ON THE PART. ELECTROLYTE CAN CAUSE CORROSION ON THE PART. 3 Use the electrolyte etch procedure, 0.002 in. (0.05 mm) deep maximum, and put a line across the old part number. 4 Use the electrolyte etch procedure, 0.002 in. (0.05 mm) deep maximum, and write the new part number in the location shown in Figure 1. (c) Complete the record sheet and return to P&WC (Ref. Figure 2). (d) Amend the LCF component list in the engine log book to reflect the new part number of the PT disk. C. Write accomplishment of P&WC S.B. No. 28311 in the applicable engine module log book. 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 5 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF**RE−IDENTIFY P/N 3072542−01**  **0.100 IN. (2.54 mm) MIN. DISTANCE**  **BETWEEN MARKING AND HOLES** 
**PUT LINES OR "X" CHARACTERS THROUGH**  **OLD PART NUMBER PT DISK** 

C195007 Re-identification of PT Disk Figure 1 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 6 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OFTO P&WC CUSTOMER SERVICE FAX No: 1 (450) 647−2888 Attn: Turboshaft, Customer Engineering FROM NAME: COMPANY: FAX NO.:

**Date of SB Incorporation on Engine: A/C Registration: A/C S/N:** 

**ENGINE INFORMATION Engine Model: Engine Serial Number:**  **Engine Total Time Since New: Flight Hrs** E−MAIL: CFirst@pwc.ca

**PT Disk S/N:**

**REMARKS RETURN THIS FORM TO P&WC IF YOU HAVE A DISK**  **LISTED IN TABLE 1 OF THIS SERVICE BULLETIN NOTE:** 

C164363 PT Disk - Record Sheet Figure 2 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 7 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF4. Appendix TABLE 1, PT Disk P/N 3044188-01 HEAT CODE SERIAL # SERIAL # SERIAL # EPAZW 57B859 57B860 57B861 57B862 57B863 57B864 57B865 57B866 57B867 57B868 57B869 57B870 57B871 57B872

EPBAY A00032MR A00032MT A00032MW A00032MX A00032MY A00032N0 A00032N1 A00032N2 A00032XE A00032XF A00032XH A00036W1 A00036W2 A00036W4 A0003HNH A0003HNK A0003HNM A0003HNP A0003HNR A0003HNT A0003HNW A0006DD5 A0006DD6

EPBAZ A00063LL A00063LN A00063LR A00063LT A00063LW A00063LX A0006DD2 A0006DD3 A0006DD4 A0006DDA A0006DDB A000941T A000941W A000941X A000941Y A0009420 A0009421 A0009422 A0009423 A0009424 A0009NHX A0009NHY A0009NK0 A0009NK1 A0009NK2 A000AB3Y

EPBLE A000AB3P A000AB3R A000AB3T A000AB3W A000AB3X A000AB40 A000AB41 A000AB42 A000AB43 A000AB44 A000B2E8 A000B2E9 A000B2EA A000B2EB A000B2EC A000B2ED A000B2EE A000B2EF A000B2EH A000B2EK 

### PRATT & WHITNEY CANADA 

# ALERT SERVICE BULLETIN
P&WC S.B. No. A28311R2

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 01/2012 **PW200-72-A28311** Revision No. 2: Jul 24/2012 Page 8 of 8 TURBOSHAFT ENGINE PT DISK - INSPECTION/REIDENTIFICATION OF