TASK 72-45-31-300-001 HPT Stage 2 Hub - Blend Repair, Repair-001 (VRS3238)

DMC:V2500-A0-72-45-3101-00A-649A-C|Issue No:005.00|Issue Date:2021-02-01

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 72-45-31-300-001 HPT Stage 2 Hub - Blend Repair, Repair-001 (VRS3238)

Effectivity

FIG/ITEM

PART NO.

01-010

2A0902

01-011

2A1202

01-011

2A3002

01-011

2A2302

01-011

2A4802

General

Damage not more than 0.001 in. (0.025 mm) is permitted without a repair unless specified differently.

The maximum rotary equipment speed is 18,000 RPM.

The practices and processes referred to in the procedure by TASK number are in the SPM.

Material of component

PART IDENT

SYMBOL

MATERIAL

Stage 2 Turbine hub

Nickel alloy

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all the necessary cleaning and inspection procedures are done before the repair.

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

CAUTION

USE THIS REPAIR FOR THE DAMAGED PARTS WHICH HAVE LESS THAN THEIR LIFE CYCLE LIMIT. THIS REPAIR WILL NOT EXTEND THE STAGE 2 TURBINE HUB LIFE CYCLE. DO NOT REPAIR THE HUB THAT HAS A CRACK OR ANY INDICATION THAT IS NOT CLEARLY THE RESULT OF LOCAL DAMAGE SUCH AS DENTS, NICKS, SCRATCHES AND CORROSION PITS. IF CRACKS OR OTHER UNUSUAL CONDITIONS ARE FOUND BY THE PENETRANT TEST OR VISUAL INSPECTION, REJECT THE PART.

Procedure

    1. Repair Facilities

    1. The Source Demonstration requirements of this repair mean that any facility not authorized to accomplish this repair either utilize the Authorized Repair Vendors listed below or contact IAE Manager Maintenance Operations 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

    2. Authorized Repair Vendors for the Shot Peen section of Repair VRS3238 are listed below:

      Pratt and Whitney Global Service Partners

      East Hartford Repair Operations (GSP-EHRO)

      400 Main Street, Well No.14 - Mail Stop 117-62

      East Hartford, CT 06108

      USA

      Tel: (860) 557-2646

      Fax: (860) 557-2647

      Metal Improvements Company Inc. (MIC)

      145 Addison Road

      P. O. Box 487

      Windsor, CT 06095

      USA

      Tel: (860) 688-6201

      Fax: (860) 285-8809

      MTU MAINTENANCE HANNOVER GmbH

      Flughafen Hannover

      Muenchner Strasse 31

      D-30855 Langenhagen

      Germany

      Tel: 49 511 7806 0

      Fax: 49 511 7806 111

      IHI Corporation

      229 Tonogaya,

      Mizuho-Machi Nishitama-Gun

      Tokyo 190 - 1297

      Japan

      Tel: 81-42-568-7362

      Fax: 81-42-568-7566

      ATTN: Program Manager, V2500

      Metal Improvements Company Inc. (MIC)

      Ascot Drive

      Derby DE24 8ST

      ENGLAND

      Attn: Program Manager, V2500

      Christchurch Engine Centre - CHCEC

      115 Orchard Road

      Christchurch 8051

      New Zealand

    3. 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 72-45-31-350-067 Blend the Splines

    1. Refer to Figure.

      2. Blend the surface damage such as dents, nicks, scratches and corrosion pits on the splines.

        1. Blend by SPM TASK 70-35-03-300-501.

        1. Do not blend the spline root radius and the spline loaded face areas.

        2. The minimum blend length to depth is 15 to 1.

        3. Remove all the lifted material.

        4. A maximum of ten splines can be repaired with a maximum blended length of 0.500 in. (12.70 mm) or less on each spline.

        5. A maximum of five splines can be repaired if the blended length is more than 0.500 in. (12.70 mm) on each spline.

        6. The maximum blend depth in Area 1 is 0.005 in. (0.13 mm).

        7. The maximum blend depth in Area 2 is 0.010 in. (0.25 mm).

        8. All the blend finish marks must follow the lay of the original machining marks.

        9. Break the spline tip edges to between 0.003 and 0.005 in. (0.08 and 0.13 mm).

        10. Break the spline end profile edges to between 0.003 and 0.015 in. (0.08 and 0.38 mm).

    3. SUBTASK 72-45-31-350-067-002 Blend the Splines (Manual Method) (DELETED)

    1. This subtask has been deleted.

    4. SUBTASK 72-45-31-350-068-001 Blend the Hub (Rotary Method) (DELETED)

    1. This subtask has been deleted.

    5. SUBTASK 72-45-31-350-068 Blend the Hub

    1. Refer to Figure, Figure, Figure, Figure and Figure.

      2. Blend the hub surface damage such as dents, nicks, scratches, wear, fretting, galling and corrosion pits.

        1. Blend by SPM TASK 70-35-03-300-501.

        1. The finish marks must follow the lay of the original tool marks.

        2. The minimum blend length to depth ratio is 15 to 1.

        3. The minimum blend radius to depth ratio is 30 to 1.

      3. Blend repair at Location 9 is not permitted.

      1. Damage not more than 0.001 in. (0.025 mm) is permitted.

      4. Blend all the areas at Location 1 to remove the surface damage that is more than 0.004 in. (0.10 mm) but 0.010 in. (0.25 mm) or less. Surface damage of 0.004 in. (0.10 mm) or less is acceptable without a repair.

      1. The maximum blend depth is 0.010 in. (0.25 mm).

      2. The maximum blend depth in Zone A which is shown in View B within Location 2 that is shown in View A is 0.025 in. (0.635 mm).

      5. Blend all the areas at Locations 2, 3 and 4 to remove the surface damage.

      1. The maximum blend depth is 0.010 in. (0.25 mm).

      6. Blend the areas at Locations 5 and 7 to remove the surface damage.

      1. The maximum blend depth is 0.005 in. (0.13 mm).

      2. The maximum blend length is 0.500 in. (12.70 mm) in a circumferential direction with a minimum distance between blends of 2.00 in. (50.80 mm).

      7. Blend the area at Location 8 to remove the surface damage.

      1. The maximum blend depth is 0.010 in. (0.25 mm).

      2. A maximum of two tabs can be blended with a minimum of five tabs that are not blended between each blended tab.

      8. Blend all the areas at Location 10 to remove the surface damage.

      1. The maximum blend depth is 0.007 in. (0.18 mm).

      9. Blend the areas at Location 6 to remove the surface damage.

      1. The maximum blend depth is 0.010 in. (0.25 mm).

      2. The maximum blended area is one third of the circumference of the hole.

      3. If the damage or blend goes through the edge of the hole blend the hole radius by the procedures given in the SPM TASK 70-35-19-350-501. Round the edges of the hole to between 0.010 and 0.030 in. (0.25 and 0.76 mm) radius (flats not include) when no part of the edge has a radius of the curvature that is less than 0.010 in. (0.25 mm) radius.

      10. Blend the areas at Location 11 to remove the surface damage.

      1. The maximum blend depth is 0.030 in. (0.76 mm).

      11. Blend the area at Location 12 to remove the surface damage.

      1. The maximum blend depth is 0.005 in. (0.13 mm).

      2. The maximum blend length is 0.250 in. (6.35 mm) in a circumferential direction with a minimum distance of 2.000 in. (50.80 mm) between blends.

      12. Blend repair at Location 13 is not permitted.

      1. Damage up to 0.003 in. (0.08 mm) is permitted.

      13. Blend the areas at Location 14 to remove surface damage.

      1. The maximum blend depth is 0.005 in. (0.13 mm). Blend the damage only, 15 to 1 aspect ratio waived in all directions. Maximum blend length is 0.600 in. (15.24 mm); each blend must be separated by 0.250 in. (6.35 mm) minimum. No more than two blends at this location.

      14. Blend the area at Location 15 to remove surface damage.

      1. The maximum repair depth is 0.004 in. (0.10 mm).

      2. A minimum blend length to depth ratio of 10 to 1 must be maintained on the flat surface area of Location 15 defined by 0.160 in. (4.06 mm) stay way zone from both edges of the slot.

      3. A minimum blend radius to depth ratio of 20 to 1 must be maintained on the flat surface area of Location 15 defined by 0.160 in. (4.06 mm) stay way zone from both edges of the slot.

      4. No mismatch is allowed.

      5. Shot peen all repaired surfaces using a minimum intensity of 6A or equivalent per authorized repair vendor.

        6. If slot is repaired by blending, mark adjacent tabs with "X" on each side of the slot. Refer to V2500 SPM TASK 70-09-00-400-501:

        1. Mark "X" in center of the tab and keep distance of 0.060 in. (1 .52 mm) from all of the edges. See Figure.

        2. Mark "X" height 0.076 in. (1.93 mm) max.

        3. Use either dot peen intermediate method 0.0015 in. (0.04 mm) maximum depth, electrolytic etch deep 0.002 in. (0.05 mm) max or vibration peen 0.006 in. (0.15 mm).

      15. Blend the area at Location X to remove the surface damage that is more than 0.001 in. (0.025 mm) but 0.004 in. (0.101 mm) or less. Surface damage of 0.001 in. (0.025 mm) or less is acceptable without repair.

      1. The maximum blend depth is 0.007 in. (0.177 mm).

      2. A minimum blend length to depth ratio of 15 to 1 is required along the circumferential direction only.

      3. Blend should not extend into the forward fillet face.

      4. No mismatch is allowed.

      5. Shotpeen the repaired area(s) using an intensity of 6A or equivalent per authorized repair vendor.

        6. If slot is repaired by blending, mark adjacent tabs with "X" on each side of the slot. Refer to SPM TASK 70-09-00-400-501.

        1. Mark "X" in center of the tab and keep distance of 0.060 in. (1.524 mm) from all of the edges. See Figure.

        2. Mark "X" height 0.076 in. (1.930 mm) maximum.

        3. Use either dot peen intermediate method 0.0015 in. (0.0381 mm) maximum depth, electrolytic etch deep 0.002 in. (0.050 mm) maximum or vibration peen 0.006 in. (0.152 mm).

    6. SUBTASK 72-45-31-230-066 Fluorescent Penetrant the Repair Areas

    1. Refer to Figure.

      2. Fluorescent penetrant inspect all of the repaired surfaces for cracks.

        1. Do the procedure given in the SPM TASK 70-23-04-230-501.

        1. No cracks are permitted.

    7. SUBTASK 72-45-31-380-056 Shotpeen the Hub Repaired Areas (Local Application)

      1. Refer to Figure, Figure, Figure or Figure.

      1. Shotpeen the repaired area(s) by SPM TASK 70-38-13-380-501.

      2. Use S-170, CW-20 or SCW-20 shot size.

      2. Shotpeen all of the repaired surfaces at Location 5.

      1. Use a minimum intensity of 6A or equivalent.

      3. Shotpeen all of the repaired surfaces at Locations 1 and 10.

      1. The minimum intensity 6A or equivalent is not required.

      2. You must shotpeen the complete repaired area.

    4. Shotpeen is not permitted at Locations 4, 12 and 14.

    8. SUBTASK 72-45-31-380-058 Shotpeen the Hub Repaired Areas (Source Demonstration Necessary)

    1. Refer to Figure, Figure, Figure or Figure.

    2. The repaired area(s) at Locations 2, 3, 6, 7, 8, 11, 15 and X require shotpeen by a vendor who has source qualification. The repair facilities authorized to do the source demonstration portion of this repair are listed in Step of this repair.

    9. SUBTASK 72-45-31-220-124 Examine the Repair

    1. Refer to Figure.

    2. Visually examine the repaired splines.

    10. SUBTASK 72-45-31-350-069 Identify the Repair

      1. Mark VRS3238 adjacent to the part number. Use the vibration peen method.

      1. Make a permanent mark by the procedures given in the SPM TASK 70-09-00-400-501.

    11. Figure: Stage 2 Turbine Hub Blend Repair Areas (PN 2A0902)

    Stage 2 Turbine Hub Blend Repair Areas (PN 2A0902)

    Figure: Stage 2 Turbine Hub Blend Repair Areas (PN 2A0902)

    Stage 2 Turbine Hub Blend Repair Areas (PN 2A0902)

    Figure: Stage 2 Turbine Hub Blend Repair Areas (PNs 2A1202, 2A2302, 2A3002, 2A4802)

    Stage 2 Turbine Hub Blend Repair Areas (PNs 2A1202, 2A2302, 2A3002, 2A4802)

    Figure: Stage 2 Turbine Hub Blend Repair Areas (PN 2A1202, 2A2302, 2A3002, 2A4802)

    Stage 2 Turbine Hub Blend Repair Areas (PN 2A1202, 2A2302, 2A3002, 2A4802)

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Marking

    Repair Marking

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedural step and figure. (19VC241A)

Change Type:

Corrected the rounding off values in repair limits. (20VC241)