TASK 72-41-23-300-028 HPC Rear Outer Case - Cooling Ports 17, 18, 19, And 20 Crack Blend Or Weld Repair, Repair-028 (VRS9537)

DMC:V2500-A0-72-41-2301-04A-627A-C|Issue No:001.00|Issue Date:2020-05-01

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 72-41-23-300-028 HPC Rear Outer Case - Cooling Ports 17, 18, 19, And 20 Crack Blend Or Weld Repair, Repair-028 (VRS9537)

Effectivity

FIG/ITEM

PART NO.

02-400

6A5682

02-400

6A8162

Material of component

PART IDENT

MATERIAL

HPC Rear Outer Case

Corrosion Resistant Steel

General

This repair must only be done when the instruction to do is given in 72-41-23, Inspection/Check.

This TASK gives the procedure to repair cracks on the HP compressor rear outer case by blending or weld.

Make sure that all the necessary cleaning and inspection procedures are done before this repair.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-181 WELDING WIRE 12% Cr. STEELLOCALCoMat 03-181

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-23-320-001 Blend the Repair Area/Areas

    1. Refer to Figure.

      2. Blend the repair area/areas at the affected cooling ports (17, 18, 19, and 20) to completely remove the crack indications per SPM TASK 70-35-03-300-501. Refer to Figure for post-blend dimensions.

      1. If post blend requirements for BLEND ONLY are met, continue to Step.

      2. If the requirements for BLEND ONLY are not met, and the requirements for WELD REPAIR are met, continue to Step.

      3. If the requirements for WELD REPAIR are not met, reject.

    2. SUBTASK 72-41-23-330-003 Remove the Surface Protection

    1. Remove the surface protection. Refer to SPM TASK 70-11-05-300-503.

    3. SUBTASK 72-41-23-350-144 Remove Insert from Bolt Hole Adjacent to the Blend Area

    1. Remove insert from bolt hole adjacent to the blend area.

    2. Refer to Repair, VRS6306 TASK 72-41-23-300-019 (REPAIR-019).

    4. SUBTASK 72-41-23-110-107 Clean the Repair Area

    1. Clean the repair area per SPM TASK 70-11-26-300-503.

    5. SUBTASK 72-41-23-230-252 Do a Local Fluorescent Penetrant Inspection

      1. Do a local fluorescent penetrant inspection of the blended area per SPM TASK 70-23-05-230-501.

      1. Use medium sensitivity water washable penetrant.

      2. No indications or cracks are permitted.

    6. SUBTASK 72-41-23-340-058 Prepare the Repair Area/Areas

    1. Prepare the repair area/areas for weld. Refer to SPM TASK 70-31-02-310-501-001.

    7. SUBTASK 72-41-23-110-108 Clean the Repair Area/Areas

    1. Clean the repair area/areas per SPM TASK 70-11-26-300-503.

    8. SUBTASK 72-41-23-310-001 Weld Build Up the Repair Area/Areas

    1. Refer to Figure.

      2. Weld build up the repair area/areas by TIG welding.

      2. Use chills and locally manufactured fixtures to minimize distortion.

      3. Use CoMat 03-181 WELDING WIRE 12% Cr. STEEL and apply sufficient weld to allow for final blending.

    9. SUBTASK 72-41-23-370-001 Locally Heat Treat the Repair Area/Areas

      1. Locally heat treat the repair area/areas. Refer to SPM TASK 70-31-02-310-501-004 and SPM TASK 70-37-00-370-501.

      1. Increase to a temperature of 1130 deg F (610 deg C) and hold for 60 minutes. Cool down to room temperature in air or argon environment.

    10. SUBTASK 72-41-23-320-002 Finish Blend the Welded Area

    1. Refer to Figure.

      2. Finish blend the welded area.

      1. Ensure the weld is finished smooth to the adjacent undamaged parent material. No mismatch is allowed.

    11. SUBTASK 72-41-23-220-222 Do a Hardness Check on the Surfaces

    1. Do a hardness check on the surfaces adjacent to the welded area/areas. Hardness must be 321 - 352 HB (334 to 366 HV) or equivalent.

    12. SUBTASK 72-41-23-110-109 Clean the Repair Area/Areas

    1. Clean the repair area/areas per SPM TASK 70-11-26-300-503.

    13. SUBTASK 72-41-23-230-253 Do a Fluorescent Penetrant Inspection

      1. Do a fluorescent penetrant inspection of the repaired area/areas per SPM TASK 70-23-05-230-501.

      1. Use medium sensitivity water washable penetrant.

      2. No indications or cracks are permitted.

    14. SUBTASK 72-41-23-220-223 Do a Visual and Dimensional Inspection

    1. Refer to Figure.

    2. Do a visual and dimensional inspection of the repair area/areas.

    15. SUBTASK 72-41-23-350-145 If Removed, Re-Install the Inserts

    1. If removed, re-install the inserts removed during Step. Refer to Repair, VRS6306 TASK 72-41-23-300-019 (REPAIR-019).

    16. SUBTASK 72-41-23-350-146 Mark the Part

      1. Permanently mark the part with VRS9537 adjacent to the assembly part number. Refer to SPM TASK 70-09-00-400-501.

      1. Use the vibration peen method.

    17. Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Legend
    1

    Repair Details And Dimensions

    1. Blend Repair Area (Typical Corners Adjacent To Bolt Holes Between Boss And Rear Flange).

    2. Blend/Weld Repair Area (Typical Corners Adjacent To Bolt Holes Between Boss And Rear Flange).

    3. 0.423 Inch (10.75 mm), Maximum Axial Width Of Repair Area, After Blending.

    4. 1.100 Inches (27.94 mm), Maximum Circumferential Length Of Repair Area, After Blending.

    5. 0.106 - 0.130 Inch (2.70 - 3.30 mm), Radius.

    6. For Blend Repair: 0.0787 Inch (2.00 mm) Minimum Post-Blend Wall Thickness.

    For Weld Repair: 0.040 Inch (1.01 mm) Minimum Post-Blend Wall Thickness.

    Close

Requirements After Job Completion

Follow-On Conditions

Action/ConditionData Module/Technical Publication
Re-apply surface protection.TASK 72-41-23-300-003
Change Type:

Added new repair. (19VG149A)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 03-181
Type:sp01
Supply Short Name:CoMat 03-181 WELDING WIRE 12% Cr. STEEL
Supply Name:CoMat 03-181 WELDING WIRE 12% Cr. STEEL
Specification Groups:
Doc NumberType
MSRR9500/10JETHETE M190 AMS 5823 AMS 5822
OMAT:3/54JETHETE M190 AMS 5823 AMS 5822
Suppliers:
ManufacturerRemarks
LOCAL
IE306
2R602
IE441