TASK 72-41-23-300-020 HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

DMC:V2500-A0-72-41-2301-03A-627A-C|Issue No:001.00|Issue Date:2020-02-01

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 72-41-23-300-020 HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

02-400

6A4154

A

02-400

6A5495

A

02-400

6A5682

A

02-400

6A8162

A

02-400

6B1427

A

Material of component

PART IDENT

MATERIAL

HP Compressor Rear Outer Case

Corrosion Resistant Steel

General

This repair must only be done when the instruction to do so is given in TASK 72-41-23-300-023 (REPAIR-023).

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Remove all details from the part in the damaged area by the applicable repairs. Refer to the V2500 A1/A5 Series EM.
For the lining, follow VRS6179 (REPAIR-002)TASK 72-41-23-300-002
For the thinwall inserts, follow VRS6306 (REPAIR-019)TASK 72-41-23-300-019
Make sure that all the cleaning and inspection procedures are done before the repair.

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 72-41-23-380-064 Prepare the Part for Repair

      1. Prepare the damage locations for weld.

      1. Refer to SPM TASK 70-31-13-310-501.

    2. If welding is not performed within 24 hours, repeat Step

    2. SUBTASK 72-41-23-310-002 Weld Build-Up Damaged HPC Rear Outer Case Stage 7 Borescope Hole(s)

    1. Refer to Figure and Figure.

      2. Weld build up inner diameter surface of holes.

      1. Refer to SPM TASK 70-31-13-310-501.

      2. It is recommended to use a fixture and/or chill blocks to prevent distortion.

    3. SUBTASK 72-41-23-370-002 Heat-Treat the HPC Rear Outer Case Stage 7 Borescope Hole(s)

      1. Locally heat-treat the repaired areas.

      1. Refer to SPM TASK 70-37-00-370-501.

      2. Heat to a temperature of 1130 deg F (610 deg C) for 60 minutes.

      3. Cool down to room temperature in air or argon environment.

    4. SUBTASK 72-41-23-350-149 Machine the HPC Rear Outer Case Stage 7 Borescope Hole(s)

    1. Refer to Figure, Figure and Figure.

      2. Finish machine the welded areas.

      1. Break all edges 0.004 in. to 0.020 in. (0.10 mm to 0.50 mm).

    5. SUBTASK 72-41-23-110-110 Chemically Clean

      1. Clean the HPC Rear Outer Case Stage 7 Borescope Hole(s).

      1. Refer to SPM TASK 70-11-03-300-503.

    6. SUBTASK 72-41-23-350-150 Do a Hardness Test

      1. Do a hardness check on the surfaces within the heat treated areas, but away from the weld and heat-affected areas. Additionally, the hardness check must be away from the insert holes.

      1. Hardness must be 334 to 366 HV or equivalent.

    7. SUBTASK 72-41-23-230-253 Do a Local Florescent Penetrant Inspection

      1. Do a local penetrant crack test of the repaired area(s).

      1. Refer to SPM TASK 70-23-05-230-501.

      2. Use high sensitivity fluorescent penetrant crack inspection.

      3. No cracks are permitted.

    8. SUBTASK 72-41-23-220-225 Examine the HPC Rear Outer Case Stage 7 Borescope Hole(s)

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

      2. Visually examine and measure the dimension of the HPC Rear Outer Case Stage 7 Borescope Hole(s).

        1. If repaired hole(s) are more than the given limits.

        1. Return to Step.

        2. If case is distorted.

        1. Reject.

    9. SUBTASK 72-41-23-350-152 Identify the Repair

      1. Vibration peen VRS9525 adjacent to the part number.

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

    10. Figure: HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    Figure: HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    Figure: HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    Figure: HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    Legend
    4

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    1. 12.666 Inch - 12.688 Inch (321.70 mm - 322.30 mm)

    2. 0.875 Inch (22.23 mm), Reference

    3. 30.600 Degrees, Reference

    4. 1.00 Inch (25.50 mm), Reference

    5. 0.555 Inch (14.10 mm), Reference

    6. 1.652 Inch - 1.675 Inch (41.96 mm - 42.56 mm)

    Close

    Figure: HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    Legend
    5

    HPC Rear Outer Case, Stage 7 Borescope Hole Damage, Weld Repair, Repair-020 (VRS9525)

    1. 3.522 Inch (89.47 mm), Reference

    2. 0.276 Inch - 0.289 Inch (7.00 mm - 7.36 mm)

    3. 22.400 Degrees, Reference

    4. 0.276 Inch - 0.289 Inch (7.00 mm - 7.36 mm)

    5. 12 Degrees, Reference

    6. 1.410 Inch - 1.433 Inch (35.81 mm - 36.41 mm)

    7. 1.247 Inch (31.67 mm), Reference

    Close

Requirements After Job Completion

Follow-On Conditions

Action/ConditionData Module/Technical Publication
Replace all details from the part in the damaged area by the applicable repairs.
For the lining, follow VRS6179 (REPAIR-002)TASK 72-41-23-300-002
For the Thinwall Inserts, follow VRS6306 (REPAIR-019)TASK 72-41-23-300-019
Apply surface protection coatingTASK 72-41-23-300-003
Change Type:

Added new repair. (19VG096)

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