Preliminary Requirements

Safety Requirements

CAUTION

USE THIS REPAIR FOR THE DAMAGED PARTS WHICH HAVE LESS THAN THEIR LIFE CYCLE LIMIT. THIS REPAIR WILL NOT EXTEND THE LIFE CYCLE. DO NOT REPAIR THE TURBINE HUB THAT HAS A CRACK OR AN 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 VRS3184 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

      Tel: 44-1-332-756-076

      Fax: 44-1-332-754-392

      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 72-45-11-350-051-001 Blend the Hub (Rotary Method)

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

      1. Refer to Figure requirements.

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

      3. Remove the rough and unwanted grit until the wheel surface is smooth before you do the blend repair.

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

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

      6. Break all blended area edges 0.003 in. to 0.015 in. (0.08 mm to 0.38 mm) if not specified differently.

      7. Damage resulting in nicks, dents and scratches up to 0.001 in. (0.025 mm) is allowed without blending.

   2. Blend repair is not permitted in all the areas at Location 4.

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

   3. 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).

   4. Blend all the areas at locations 3, 5 and 6 to remove the surface damage.

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

   5. Blend all the areas at location 8 to remove the surface damage.

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

         1. The maximum blend length is 0.500 in. (12.7 mm) in a circumferential direction with a minimum distance between blends of 2.00 inches (50.8 mm).

   6. Blend all the areas at location 9 to remove the surface damage.

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

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

   7. Blend the area at location 7 to remove the surface damage.

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

         1. The maximum blend length is 0.250 in. (6.35 mm) in a circumferential direction with a minimum distance between blends of 2.00 inches (50.8 mm).

   8. Blend the area at location 2 to remove the surface damage.

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

   9. Blend the area at location 11 to remove the surface damage.

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

         1. A maximum of ten teeth can be blended when the blended area on one repaired tooth is 0.500 in. (12.7 mm) or less in length.

         2. A maximum of five teeth can be blended when the blended area on one repaired tooth is more than 0.500 in. (12.7 mm) in length.

            NOTE

            For PNs 2A5001 and 2A2801, make sure fit 1517 at location 10 is maintained. The Stage 1 HPT Hubs that incorporated SB 72-0451 have metering plugs. Post SB 72-0511 Stage 1 HPT Hubs do not have metering plugs.

   10. Blend all the areas at location 10 to remove the surface damage.

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

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

          2. The blend must be smooth and continuous into the original contour in all directions.

          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.

          4. Break the edges of the hole to between 0.010 in. and 0.030 in. (0.25 mm and 0.76 mm) radius (flats not included) when no part of the edge has a radius of the curvature that is less than 0.010 in. (0.25 mm) radius.

   11. Blend repair at location 12 is not permitted.

       1. Damage not more than 0.003 in. (0.08 mm) is permitted, with no raised material or sharp edges.

3. SUBTASK 72-45-11-350-051-002 Blend the Hub (Manual Method)

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

      1. Refer to Figure requirements.

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

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

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

         4. Break all blended area edges 0.003 in. to 0.015 in. (0.08 mm to 0.38 mm) if not specified differently.

         5. Damage resulting in nicks, dents and scratches, up to 0.001 in. (0.025 mm) is allowed without blending.

   2. Blend repair is not permitted in all the areas at Location 4.

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

   3. 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).

   4. Blend all the areas at locations 3, 5 and 6 to remove the surface damage.

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

   5. Blend all the areas at location 8 to remove the surface damage.

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

         1. The maximum blend length is 0.500 in. (12.7 mm) in a circumferential direction with a minimum distance between blends of 2.000 inches (50.8 mm).

   6. Blend all the areas at location 9 to remove the surface damage.

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

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

   7. Blend the area at location 7 to remove the surface damage.

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

         1. The maximum blend length is 0.250 in. (6.35 mm) in a circumferential direction with a minimum distance between blends of 2.000 inches (50.8 mm).

   8. Blend the area at location 2 to remove the surface damage.

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

   9. Blend the area at location 11 to remove the surface damage.

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

         1. A maximum of ten teeth can be blended when the blended area on one repaired tooth is 0.500 in. (12.7 mm) or less in length.

         2. A maximum of five teeth can be blended when the blended area on one repaired tooth is more than 0.500 in. (12.7 mm) in length.

            NOTE

            For PNs 2A5001 and 2A2801, make sure fit 1517 at location 10 is maintained. The Stage 1 HPT Hubs that incorporated SB 72-0451 have metering plugs. Post SB 72-0511 Stage 1 HPT Hubs do not have metering plugs.

   10. Blend all the areas at location 10 to remove the surface damage.

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

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

          2. The blend must be smooth and continuous into the original contour in all directions.

          3. If the damage or blend goes through the edge of the hole blend the hole radius by the procedures given in SPM TASK 70-35-19-350-501.

          4. Break the edges of the hole to between 0.010 in. and 0.030 in. (0.25 mm and 0.76 mm) radius (flats not included) when no part of the edge has a radius of the curvature that is less than 0.010 in. (0.25 mm) radius.

   11. Blend repair at location 12 is not permitted.

       1. Damage not more than 0.003 in. (0.08 mm) is permitted, with no raised material or sharp edges.

4. SUBTASK 72-45-11-230-054 Fluorescent Penetrant the Repair Areas

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

      1. Refer to Figure.

      2. Do the procedure given in the TASK 72-45-11-200-000 and applicable part number.

      3. No cracks permitted.

5. SUBTASK 72-45-11-380-057 Shotpeen the Hub Repaired Areas (Local Application)

   1. Refer to Figure and Figure.

   2. Shot peen all of the repaired surfaces at locations 1 and 2. The minimum intensity 6A or equivalent is not required. You must shot peen the complete repaired area.

      1. Do the procedure given in SPM TASK 70-38-13-380-501.

         1. Use CoMat 05-032 CAST STEEL SHOT, S170.

   3. No shot peen is permitted at locations 6, 7 and 11.

6. SUBTASK 72-45-11-380-058 Shot Peen the Hub Repaired Areas (Source Demonstration Necessary)

   1. Refer to Figure and Figure.

   2. The repaired areas at locations 3, 5, 8, 9 and 10 require shotpeen by a vendor that has source demonstration approval. The repair facilities authorized to do the source demonstration portion of this repair are listed in 4.B. of this repair.

7. SUBTASK 72-45-11-350-068 Identify the Repair

   1. Mark VRS3184 adjacent to the part number.

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

         Use the vibration peen method.

Figure: Repair Details and Dimensions

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Repair Details and Dimensions

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Figure: Repair Details and Dimensions

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Repair Details and Dimensions

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