TASK 72-61-49-300-004 Gearbox Breather Outlet Oil Duct - Weld Repair A Patch, Repair-004 (VRS7503)

DMC:V2500-A0-72-61-4900-01A-627A-C|Issue No:002.00|Issue Date:2014-08-01

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 72-61-49-300-004 Gearbox Breather Outlet Oil Duct - Weld Repair A Patch, Repair-004 (VRS7503)

Effectivity

FIG/ITEM

PART NO.

01-010

740-5720-505

Material of component

DESCRIPTION

SYMBOL

MATERIAL

Gearbox breather duct

Stainless Steel T66

General

This repair can be done on the gearbox breather outlet duct during overhaul.

Price and availability - none.

Related repairs - none.

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

NOTE

To identify the consumable materials refer to the (PCI).

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Argon-arc welding equipmentLOCALArgon-arc welding equipment
Wire brushLOCALWire brush

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-076 METHYL ETHYL KETONELOCALCoMat 01-076
CoMat 02-099 LINT-FREE CLOTHLOCALCoMat 02-099
CoMat 03-204 WELDING FILLER WIRELOCALCoMat 03-204

Local supply material: MIL-T-8808B Type 347 0.032 in. (0.81 mm).

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-61-49-110-001 Clean the Gearbox Breather Outlet Duct

      1. WARNING

        KEEP FLAMES AND ELECTRICAL EQUIPMENT WHICH IS NOT FLAMEPROOF AWAY FROM THE WORK AREA. THE CLEANING FLUID IS FLAMMABLE.

        WARNING

        DO NOT GET CLEANING FLUID ON YOUR SKIN OR IN YOUR EYES. PUT ON PROTECTIVE CLOTHING, GOGGLES AND A MASK. USE THE FLUID IN A WELL VENTILATED AREA. DO NOT BREATHE THE GAS. IF YOU GET THE FLUID ON YOUR SKIN OR IN YOUR EYES, FLUSH IT AWAY WITH WATER. GET MEDICAL AID IF YOUR SKIN OR EYES BECOME IRRITATED.

        Clean the gearbox breather outlet duct.

      1. Refer to Cleaning-001 TASK 72-61-49-100-101.

    2. SUBTASK 72-61-49-350-001 Prepare the Damaged Area

    1. Refer to Figure.

      2. Identify the area to be removed.

      1. Make sure that the mark is symmetrical in shape and larger all around than the damaged area.

      3. Removed the damaged area.

      1. Use the standard workshop tools and cut along the mark around the damaged area. Remove the damaged area.

      4. Remove all the sharp edges from the cut-out in the gearbox breather outlet duct.

      1. Use the standard workshop tools.

    3. SUBTASK 72-61-49-350-002 Make a Repair Patch

      1. Make a repair patch.

      1. Use the standard workshop tools and either a section of used gearbox breather outlet duct or the applicable repair material.

      2. Make the repair patch to the same dimensions as the cut-out in the gearbox outlet duct.

      3. Roll the material until the contour of the repair patch and the gearbox breather outlet duct are the same.

      2. Remove the sharp edges from the repair patch.

      1. Use the standard workshop tools.

    4. SUBTASK 72-61-49-110-002 Clean the Gearbox Breather Outlet Duct

      1. WARNING

        KEEP FLAMES AND ELECTRICAL EQUIPMENT WHICH IS NOT FLAMEPROOF AWAY FROM THE WORK AREA. THE CLEANING FLUID IS FLAMMABLE.

        WARNING

        DO NOT GET CLEANING FLUID ON YOUR SKIN OR IN YOUR EYES. PUT ON PROTECTIVE CLOTHING, GOGGLES AND A MASK. USE THE FLUID IN A WELL VENTILATED AREA. DO NOT BREATHE THE GAS. IF YOU GET THE FLUID ON YOUR SKIN OR IN YOUR EYES, FLUSH IT AWAY WITH WATER. GET MEDICAL AID IF YOUR SKIN OR EYES BECOME IRRITATED.

        Clean the gearbox breather outlet duct.

      1. Refer to Cleaning-001 TASK 72-61-49-100-101.

    5. SUBTASK 72-61-49-310-001 Install the Repair Patch

      1. Put the repair patch into the correct position for installation.

      1. If necessary, tack weld the repair patch into position.

      2. Weld the repair patch.

      2. The welding data is as follows:

        Type - Argon-arc D.C Torch - B.O.C W200 or equivalent

        Electrode - 2% ceriated tungsten with 0.0625 in. (1.54 mm) diameter

    3. NOTE

      The argon backing flow, the argon torch flow and the current flow must be determined by experiment on suitable test pieces.

      Let the repair cool.

    6. SUBTASK 72-61-49-120-001 Clean the Repaired Area

      1. Clean the repaired area.

      1. Use the Wire brush to remove unwanted materials caused by the repair.

    7. SUBTASK 72-61-49-220-009 Examine the Repair

      1. Visually examine the repaired area of the gearbox breather outlet duct.

      2. Make sure that the repair is satisfactory.

    8. SUBTASK 72-61-49-230-003 Examine the Repair

      1. Do the dye-penetrant test of the repair.

    9. SUBTASK 72-61-49-260-001 Examine the Repair

      1. Do the X-ray inspection of the repair.

    10. SUBTASK 72-61-49-780-001 Pressure Test the Gearbox Breather Outlet Duct

      1. Do a pressure test of the gearbox outlet duct.

      1. Refer to Testing-001 TASK 72-61-49-700-101.

    11. SUBTASK 72-61-49-850-001 Put the Repair Number on the Gearbox Breather Outlet Duct

      1. Put the repair number VRS7503 on the gearbox breather outlet duct adjacent to the part number using electro-etch method.

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

    12. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Changed thoriated tungsten to ceriated tungsten.

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 01-076
Type:sp01
Supply Short Name:CoMat 01-076 METHYL ETHYL KETONE
Supply Name:CoMat 01-076 METHYL ETHYL KETONE
Specification Groups:
Doc NumberType
METHYL ETHYL KETONE, TECHNICAL GRADE, CERTIFIED TO BSI BS 1940 OR ASTM D740, OR TT-M-261
Suppliers:
ManufacturerRemarks
LOCAL
Manufacturer Code:X222X
Supply Number:CoMat 02-099
Type:sp01
Supply Short Name:CoMat 02-099 LINT-FREE CLOTH
Supply Name:CoMat 02-099 LINT-FREE CLOTH
Specification Groups:
Doc NumberType
WHERE COMAT 02-099 IS SPECIFIED WITH NO SUFFIX, USE COMAT 02-099A OR COMAT 02-099B.
Suppliers:
ManufacturerRemarks
X222X
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
Tool Number:Argon-arc welding equipment
Tool Name:Argon-arc welding equipment
Manufacturer Code:LOCAL
Tool Number:Wire brush
Tool Name:Wire brush