TASK 72-41-12-300-019 HPC Stage 9 - 12 Drum Disk - Blend Repair To Restore The Surface Condition On The Dovetail Slots, Repair-019 (VRS9136)

DMC:V2500-A0-72-41-1201-02A-649A-C|Issue No:004.00|Issue Date:2021-08-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-41-12-300-019 HPC Stage 9 - 12 Drum Disk - Blend Repair To Restore The Surface Condition On The Dovetail Slots, Repair-019 (VRS9136)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

01-600

6A4131

A

01-600

6A4156

B

01-600

6A6546

B

01-600

6A7545

A

01-600

6A7546

C

01-600

6A7547

B

01-600

6A7574

A

Material of component

PART IDENT

SYMBOL

MATERIAL

HP Compressor stage 9 to 12

disks shaft assembly

QZD

Inconel 718

General

This Repair must only be done when the instruction to do so is given in 72-41-12 Inspection.

This Repair permits the restoration of the surface condition on the dovetail slots in the areas identified AB and AC only by the application of shot-peen.

The shotpeened part of this repair requires to be source demonstrated and can only be done by approved vendors. The shotpeen areas of this repair are "Peening Critical" areas.

Each stage of the HP Compressor Stage 9 to 12 disks - shaft assembly - dovetail slots can only be shot-peened two times.

The practices and processes referred to in the procedures by the TASK/SUBTASK numbers, are in the SPM.

For Zone A, if the damage is galling only, with a maximum of 0.002 in. (0.051 mm), you must do Step.

Deleted.

NOTE

More equipment and materials necessary to do this repair are in the SPM TASK 70-09-00-400-501, SPM TASK 70-11-39-300-503, SPM TASK 70-23-05-230-501, SPM TASK 70-35-03-300-501 and SPM TASK 70-38-13-380-501.

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

CAUTION

YOU MUST NOT REMOVE MATERIAL FROM ZONE A OR ZONE D.

Procedure

    1. Repair Facilities

      1. Only the shot peening part of this Repair requires Source Demonstration. This means that any facility not authorized to shot peen, either utilize the Authorized Repair Vendors listed below or contact the IAE Repair Services Group to determine if a qualification program can be initiated at their facility.

        IAE International Aero Engines AG

        400 Main Street

        M/S 121-10

        East Hartford CT 06118

        U.S.A.

        Attn: Manager Technical Services

        1. Authorized Repair Vendors for the shotpeening portion of VRS9136 are listed below:

          METAL IMPROVEMENT COMPANY INC.

          DERBY DIVISION (UK)

          ASCOT DRIVE

          DERBY DE2 8ST

          ENGLAND

          ATTN: DIVISION MANAGER

          METAL IMPROVEMENT COMPANY INC.

          145 ADDISON ROAD

          WINDSOR

          CONNECTICUT

          CT06095

          U.S.A.

          ATTN: DIVISION MANAGER

          MTU MAINTENANCE HANNOVER GMBH

          MUNCHNER STRASSE 31

          30855 LANGENHAGEN

          GERMANY

          ATTN. MANAGER, QUALITY ASSURANCE

          ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES CO. LTD.

          229 TONOGAYA, MIZUHO-MACHI

          NISHITAMA-GUN

          TOKYO 190-1292

          JAPAN

          Christchurch Engine Center (CHCEC)

          115 Orchard Road

          Christchurch International Airport

          Christchurch 8051

          New Zealand

        1. The designation by IAE of an Authorized Repair Vendor indicates that the Repair Vendor has demonstrated the necessary capability to enable it to carry out the listed repair work. However, IAE makes no warranties or representations concerning the qualifications or quality standards of the Repair Vendors to carry out the repair work, and accepts no responsibility whatsoever for any work that may be carried out by a Repair Vendor other than when IAE is listed as the Repair Vendor. Authorized Repair Vendors do not act as agents or representatives of IAE.

    2. SUBTASK 72-41-12-220-094-A00 Examine the Assembly, Assembly A

    1. Refer to Figure and Figure.

      2. Visually examine the HP Compressor stage 9 to 12 disks shaft assembly, to tell you if shot-peening has been done before in the stage 9, 10, 11 and 12 dovetail slots.

      1. Look for the identification code symbol next to the assembly part number.

      2. The stage 9 dovetail slot cannot be shot-peened again if you see a code symbol with the letter M. The stage 10 dovetail slot can not be shot-peened again if you see a code symbol with the letter R. The stage 11 dovetail slot can not be shot-peened again if you see a code symbol with the letter V. The stage 12 dovetail slot can not be shot-peened again if you see a code symbol with the letter Z.

    3. SUBTASK 72-41-12-220-094-B00 Examine the Assembly, Assembly B, and Assembly C

    1. Refer to Figure and Figure.

      2. Visually examine the HP Compressor stage 9 to 12 disks shaft assembly, to tell you if shot-peening has been done before in the stage 9, 10, 11 and 12 dovetail slots.

      1. Look for the identification code symbol next to the assembly part number.

      2. The stage 9 dovetail slot can not be shot-peened again if you see a code symbol with the letter M. The stage 10 dovetail slot can not be shot-peened again if you see a code symbol with the letter R. The stage 11 dovetail slot can not be shot-peened again if you see a code symbol with the letter V. The stage 12 dovetail slot can not be shot-peened again if you see a code symbol with the letter Z.

    4. SUBTASK 72-41-12-350-082-A00 Remove Damaged Area(s), Assembly A, Zone B only

    1. Refer to Figure, Figure, and Figure.

      2. Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is galling or frettage you must dress to a depth to a maximum depth of 0.005 in. (0.127 mm).

    4. If material damage is nicks or scores you must dress to 2 x depth to a maximum depth of 0.005 in. (0.127 mm).

      NOTE

      Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

    5. Deleted.

    6. Deleted.

    5. SUBTASK 72-41-12-350-082-B00 Remove Damaged Area(s), Assembly B, and Assembly C, Zone B only

    1. Refer to Figure, Figure, and Figure.

      2. NOTE

        Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

        Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is galling or frettage you must dress to a depth to a maximum depth of 0.005 in. (0.127 mm).

    4. If material damage is nicks or scores you must dress to 2 x depth to a maximum depth of 0.005 in. (0.127 mm).

    5. Deleted.

    6. Deleted.

    6. SUBTASK 72-41-12-350-083-A00 Remove Damaged Area(s), Assembly A, Zone C only

    1. Refer to Figure, Figure, and Figure.

      2. NOTE

        Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

        Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is galling or frettage you must dress to a depth to a maximum depth of 0.002 in. (0.051 mm).

    4. If material damage is nicks or scores you must dress to 2 x depth to a maximum depth of 0.002 in. (0.051 mm).

    5. Deleted.

    6. Deleted.

    7. SUBTASK 72-41-12-350-083-B00 Remove Damaged Area(s), Assembly B, Zone C only

    1. Refer to Figure, Figure, and Figure.

      2. NOTE

        Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

        Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is galling or frettage you must dress to a depth to a maximum depth of 0.002in. (0.051 mm).

    4. If material damage is nicks or scores you must dress to 2 x depth to a maximum depth of 0.002in. (0.051 mm).

    5. Deleted.

    6. Deleted.

    8. SUBTASK 72-41-12-350-083-C00 Remove Damaged Area(s), Assembly C, Zone C only

    1. Refer to Figure, Figure, and Figure.

      NOTE

      Material removal can overlap into other zones. If this occurs then you must use the limits with a minimum material removal.

      2. Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. For stage 9 thru stage 12 front and rear loading slots only: If material damage is galling or frettage, you must dress to a depth to a maximum depth of 0.002 in. (0.051 mm).

    4. For stage 9 thru stage 12 front and rear loading slots only: If material damage is nicks or scores, you must dress to 2 x depth to a maximum depth of 0.002 in. (0.051 mm).

      5. For stage 9 thru stage 12 front and stage 9 thru stage 11 rear locking slots only: If material damage is dents, nicks, scores, galling, or frettage, you must remove additional parent material of 0.002 in. - 0.003 in. (0.051 mm - 0.076 mm) more than the damage depth, to a maximum depth of 0.008 in. (0.203 mm).

      1. Keep a minimum blend length to depth ratio of 15 to 1.

      6. For stage 12 rear locking slots only: If material damage is dents, nicks, scores, galling, or frettage, you must remove additional parent material of 0.002 inch (0.051 mm) minimum more than the damage depth, to a maximum depth of 0.004 in. (0.102 mm).

      1. Keep a minimum blend length to depth ratio of 30 to 1.

    9. SUBTASK 72-41-12-350-084-A00 Remove Damaged Area(s), Assembly A, Zone E only

    1. Refer to Figure, Figure, and Figure.

      2. NOTE

        Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

        Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is nicks, scores, galling, or frettage dress to a maximum depth of 0.005 in. (0.127 mm).

    4. Deleted.

    5. Deleted.

    10. SUBTASK 72-41-12-350-084-B00 Remove Damaged Area(s), Assembly B, and Assembly C, Zone E only

    1. Refer to Figure, Figure, and Figure.

      2. NOTE

        Material removal may overlap into other zones. If this occurs you must use the limits with the least material removal.

        Remove damaged material.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. You must restore corner radii.

    3. If material damage is nicks, scores, galling or frettage dress to a depth to a maximum depth of 0.005 in. (0.127 mm).

    4. Deleted.

    5. Deleted.

    11. SUBTASK 72-41-12-220-110-A00 Examine the Repaired Area(s), Assembly A

    1. Refer to Figure, Figure, and Figure.

      2. Make a visual inspection of the repaired area(s) and measure the depth of the repaired area(s).

      1. NOTE

        Material removal may overlap into other Zones. If this occurs you must use the limit with the least material removal.

        Make sure the surface finish compares with the adjacent surfaces.

      2. Refer to the different Zones for the maximum depth of material removal.

    12. SUBTASK 72-41-12-220-110-B00 Examine the Repaired Area(s), Assembly B, and Assembly C

    1. Refer to Figure, Figure, and Figure.

      2. Make a visual inspection of the repaired area(s) and measure the depth of the repaired area(s).

      1. NOTE

        Material removal may overlap into other Zones. If this occurs you must use the limit with the least material removal.

        Make sure the surface finish compares with the adjacent surfaces.

      2. Refer to the different Zones for the maximum depth of material removal.

    13. SUBTASK 72-41-12-110-077 Cold Ferric Chloride Etch

      1. Swab etch the repaired area(s).

      1. Refer to the SPM TASK 70-11-39-300-503.

    14. SUBTASK 72-41-12-220-111 Binocular Examine the Repaired Area(s)

      1. Examine the repaired area(s).

      1. Indications of defects on the repaired surface(s) are not permitted.

      2. Make sure that there is no raised material remaining.

    15. SUBTASK 72-41-12-230-073 Do a Crack Test

      1. Do a penetrant crack test of the repaired area(s) by one of the following methods:

      1. Local fluorescent penetrant inspection by SPM TASK 70-23-05-230-501. Use ultra high sensitivity. Cracks are not permitted.

      2. Fluorescent penetrant inspection by SPM TASK 70-23-04-230-501. Cracks are not permitted.

    16. SUBTASK 72-41-12-110-078 Chemically Clean

    1. Chemically clean the part.

    2. Refer to the SPM TASK 70-11-03-300-503.

    17. SUBTASK 72-41-12-380-056-A00 Shotpeen the Dovetail Slot(s) Assembly A, Assembly B, and Assembly C

    1. This is a Source Approved Repair. Send repairable parts to an approved Vendors in Repair Facilities, see Step.

      Due to the critical nature of this repair, sources must demonstrate to Pratt & Whitney their capabilities to perform this repair and be licensed by Pratt & Whitney. Write to the address below for information about the qualification program to become an approved and licensed source.

      Refer to the contact information provided in 70-40-00, General-01 (TASK 70-40-00-400-501), Figure 1 in the Standard Practices Manual, PN 585005.

    18. SUBTASK 72-41-12-380-056-B00 Shotpeen the Dovetail Slot(s), Assembly B (DELETED)

    1. This subtask has been deleted.

    19. SUBTASK 72-41-12-220-095-A00 Examine the Shotpeened Area(s), Assembly A (DELETED)

    1. This subtask has been deleted.

    20. SUBTASK 72-41-12-220-095-B00 Examine the Shotpeened Area(s), Assembly B (DELETED)

    1. This subtask has been deleted.

    21. SUBTASK 72-41-12-350-071-A00 Identify the Repair, Assembly A

    1. Refer to Figure and Figure.

      2. NOTE

        The letter inside the code symbol shows the number of times this area has been shotpeened.

        Mark a code symbol adjacent to the assembly number, use vibration peen method, to show which dovetail slot(s) on the stage 9, 10, 11, and/or 12 are shotpeened.

      1. Refer to the SPM TASK 70-09-00-400-501.

    22. SUBTASK 72-41-12-350-071-B00 Identify the Repair, Assembly B, and Assembly C

    1. Refer to Figure and Figure.

      2. NOTE

        The letter inside the code symbol shows the number of times this area has been shotpeened.

        Mark a code symbol adjacent to the assembly number, use vibration peen method, to show which dovetail slot(s) on the stage 9, 10, 11, and/or 12 are shotpeened.

      1. Refer to the SPM TASK 70-09-00-400-501.

    23. Figure: Repair Details And Dimensions - Assembly A

    Repair Details And Dimensions - Assembly A

    Figure: Repair Details And Dimensions - Assembly B And Assembly C

    Repair Details And Dimensions - Assembly B And Assembly C

    Figure: Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

    Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

    Figure: Repair details and dimensions - Assembly A and Assembly B

    Repair details and dimensions - Assembly A and Assembly B

    Figure: Repair Details And Dimensions - Assembly A And Assembly B

    Repair Details And Dimensions - Assembly A And Assembly B

    Figure: Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

    Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

    Figure: Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

    Repair Details And Dimensions - Assembly A, Assembly B, And Assembly C

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the full procedure. (19VG161)

Change Type:

Editorial to add inadvertently removed step. (18VG417)