TASK 75-24-49-300-025 LPT ACC Cooling Air Ducts - Weld Repair, Repair-025 (VRS4261)

DMC:V2500-A0-75-24-4911-01A-627A-C|Issue No:001.00|Issue Date:2013-11-01

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 75-24-49-300-025 LPT ACC Cooling Air Ducts - Weld Repair, Repair-025 (VRS4261)

Effectivity

FIG/ITEM

PART NO.

02-010

3A1662

03-010

3A1666

Material of component

PART IDENT

IAE SYMBOL

MATERIAL

Upper air cooling duct tubes

TiCu2

Upper air cooling duct housing

1.4544.9

Lower air cooling duct tubes

TiCu-2

Lower air cooling duct housing

1.4544.9

General

Price and availability - none.

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

NOTE

For more equipment and materials necessary to do this repair, refer to SPM TASK 70-31-13-310-501, SPM TASK 70-23-05-230-501 and SPM TASK 70-23-02-230-501.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Crack detection kit (fluorescent)LOCALCrack detection kit (fluorescent)
Vacuum furnaceLOCALVacuum furnace

2400 deg F (1315 deg C) - bottom loading

Tungsten inert gas system (TIG)LOCALTungsten inert gas system (TIG)
Unltraviolet lampLOCALUltraviolet lamp

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-204 WELDING FILLER WIRELOCALCoMat 03-204
CoMat 03-246 WELDING MATERIALLOCALCoMat 03-246

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-110-075 Clean the Upper and Lower Air Cooling Duct Assemblies

    1. Refer to Figure and Figure.

      2. Clean the areas around the nicks, cracks or wear on the two sides of the upper and lower air cooling duct assemblies.

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

      2. Keep accurately to the cleaning policy as described, to avoid damage to the titanium.

    2. SUBTASK 75-24-49-350-099 Weld Repair the Upper and Lower Air Cooling Duct Assemblies

      NOTE

      Weld repair at the tube/housing connectors is not permitted.

    1. Refer to Figure and Figure.

      2. Tungsten inert gas weld the nicks, cracks or wear on the upper and lower air cooling duct assemblies.

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

      2. Use protective gas equipment for purity of welds.

      3. Use CoMat 03-246 WELDING MATERIAL to repair nicks, cracks or wear on tubes.

      4. Use CoMat 03-204 WELDING FILLER WIRE to repair nicks, cracks or wear on housing.

    3. SUBTASK 75-24-49-230-090 Examine the Welded Areas for Cracks

      1. Do the test for cracks.

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

      3. No cracks are permitted.

    4. SUBTASK 75-24-49-350-100 Dress the Welded Areas

      1. Dress welds smooth on repaired surfaces.

      1. Use files or hand held stones.

      2. Maximum step of 0.003 in. (0.076 mm) to parent material is permitted.

      3. No raised material is permitted in area A1.

      2. Polish welds in area 1.

      1. Refer to Repair, VRS4048 (Repair-004) TASK 75-24-49-300-004.

    5. SUBTASK 75-24-49-350-101 Heat Treat the Upper and Lower Air Cooling Duct Assemblies after Weld Repair of the Tubes

      NOTE

      If only the upper and lower air cooling duct assemblies housing has been welded, no heat treat is required.

    1. Refer to Figure and Figure.

      2. Heat treat the upper and lower air cooling duct assemblies.

      1. Use Vacuum furnace bottom loading for 2 hours at 887 deg F (475 deg C).

      2. Argon or vacuum atmosphere is acceptable.

    6. SUBTASK 75-24-49-230-091 Do the Post Repair Inspection

      1. Do the test for cracks.

      1. Refer to SPM TASK 70-23-02-230-501.

      3. No cracks are permitted.

    7. Figure: Weld Repair of the Upper and Lower Air Cooling Duct Assemblies

    Weld Repair of the Upper and Lower Air Cooling Duct Assemblies

    Weld Repair of the Upper and Lower Air Cooling Duct Assemblies

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 03-204
Type:sp01
Supply Short Name:CoMat 03-204 WELDING FILLER WIRE
Supply Name:CoMat 03-204 WELDING FILLER WIRE
Specification Groups:
Doc NumberType
OMAT:306MSRR9500/2 B.S.2901:1970 347 S96/FORM. BSS2901 A8Nb
Suppliers:
ManufacturerRemarks
LOCAL
22994
IE306
Manufacturer Code:LOCAL
Supply Number:CoMat 03-246
Type:sp01
Supply Short Name:CoMat 03-246 WELDING MATERIAL
Supply Name:CoMat 03-246 WELDING MATERIAL
Specification Groups:
Doc NumberType
B.S.TA22 DTD 5133 TIMETAL 230 TI-P11 WL3.7124.1
Suppliers:
ManufacturerRemarks
LOCAL
U9025
K6835
0MRR3
Manufacturer Code:LOCAL
Tool Number:Crack detection kit (fluorescent)
Tool Name:Crack detection kit (fluorescent)
Manufacturer Code:LOCAL
Tool Number:Tungsten inert gas system (TIG)
Tool Name:Tungsten inert gas system (TIG)
Manufacturer Code:LOCAL
Tool Number:Ultraviolet lamp
Tool Name:Unltraviolet lamp
Manufacturer Code:LOCAL
Tool Number:Vacuum furnace
Tool Name:Vacuum furnace