TASK 72-42-35-300-007 No. 4 Bearing Front Cooling Duct - Weld Repair To Replace The Spacer, Repair-007 (VRS3648)

DMC:V2500-A0-72-42-3500-01A-627A-C|Issue No:003.00|Issue Date:2015-11-01

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 72-42-35-300-007 No. 4 Bearing Front Cooling Duct - Weld Repair To Replace The Spacer, Repair-007 (VRS3648)

Effectivity

FIG/ITEM

PART No.

01-010

2A0892-001

01-010

2A3810-01

Material of component

PART IDENT

SYMBOL

MATERIAL

No. 4 bearing front cooling duct

-

Nickel alloy

General

Price and availability - Refer to IAE

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

NOTE

To identify the consumable materials, refer to the PCI.

Repair Details

Name

Material/Specification

Quantity

Spacer (Locally Fabricated)

AMS 5662

AR

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Silicon carbide wheelLOCALSilicon carbide wheel

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-284 WELDING FILLER WIRE, NiBASELOCALCoMat 03-284
CoMat 10-130 ANTIGALLING COMPOUND8F024CoMat 10-130

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-35-110-058 Clean the No. 4 Bearing Front Cooling Duct

      1. Clean the cooling duct.

      1. Refer to TASK 72-42-35-100-000 (CLEANING-000).

    2. SUBTASK 72-42-35-320-002 Machine the Damaged Area of the No. 4 Bearing Front Cooling Duct

      1. Machine or blend to remove the damaged spacer.

      1. Refer to Figure and Figure.

        Cut at the initial weld line to remove the damaged spacer.

        Maintain a maximum diameter of 0.765 in. (19.431 mm) after you remove the spacer.

    3. SUBTASK 72-42-35-370-054 Locally Fabricate and Heat Treat the Spacer

      1. Locally fabricate the spacer from AMS 5662 to the dimensions given in Figure.

      1. Thread the spacer stud to 0.190-32 UNJF-3A.

      2. Only rolled threads are permitted. Surface roughness of the rolled threads must be not more than 32 microinches (0.8 micrometers) before you apply coat.

      2. Heat treat the spacer.

      1. Do the procedure in the SPM TASK 70-37-32-370-501.

      3. Perform hardness check on the spacer.

      1. Hardness must be Rockwell C36 minimum or equivalent.

    4. SUBTASK 72-42-35-110-059 Clean the Repair Area of the No. 4 Bearing Front Cooling Duct

      1. Clean the area to be welded.

      1. Use a rotary austenitic stainless steel wire brush or a Silicon carbide wheel to remove oxides. Refer to SPM TASK 70-31-13-310-501.

      2. Clean the repair area. Refer to SPM TASK 70-11-26-300-503.

    5. SUBTASK 72-42-35-310-053 Weld the Locally Fabricated Spacer into the No. 4 Bearing Front Cooling Duct

    1. Put the spacer in position.

      2. Weld the spacer to the cooling duct.

      1. Refer to Figureand Figure.

        Do the procedure in the SPM TASK 70-31-13-310-501.

        Use the manual gas tungsten arc weld method.

    6. SUBTASK 72-42-35-230-056 Examine the No. 4 Bearing Front Cooling Duct After Weld Repair

      1. Do a fluorescent penetrant inspection of the repair area.

      1. Refer to the SPM TASK 70-23-05-230-501 (medium sensitivity).

        No cracks are permitted.

    7. SUBTASK 72-42-35-370-053 Stress-Relieve the No. 4 Bearing Front Cooling Duct

      1. Stress-relieve the cooling duct.

      1. Do the procedure in the SPM TASK 70-37-01-370-501.

    8. SUBTASK 72-42-35-220-057 Examine the No. 4 Bearing Front Cooling Duct

      1. Do a fluorescent penetrant inspection of the cooling duct.

      1. Do the procedure in the SPM TASK 70-23-01-230-501 or SPM TASK 70-23-02-230-501.

        No cracks are permitted.

    9. SUBTASK 72-42-35-220-059 Do a Hardness Check on the No. 4 Bearing Front Cooling Duct

      1. Do a hardness check on the parent material adjacent to the welded spacer.

      1. The hardness must be Rockwell C36 minimum or equivalent.

    10. SUBTASK 72-42-35-220-062 Examine the No. 4 Bearing Front Cooling Duct

      1. Examine the diameters of the cooling duct and the location of the spacer(s).

      1. Refer to Figure and TASK 72-42-35-200-000 (INSPECTION/CHECK).

    11. SUBTASK 72-42-35-380-002 Apply Antigalling Compound on the Spacer Threads

    1. CAUTION

      YOU MUST DO Step AFTER YOU COMPLETE ALL THE INSPECTIONS AND APPLICABLE REPAIRS AND BEFORE YOU INSTALL THE PART INTO THE ENGINE.

      Refer to Figure.

      2. Apply antigalling compound on the spacer threads.

    12. SUBTASK 72-42-35-350-057 Identify the Repair

      1. Make a mark VRS3648 adjacent to the part number.

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

        Use the vibro-engraving method.

    13. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added Figure 04 and a procedure to apply antigalling compound on the spacer threads. (15VC525)

Manufacturer Code:8F024
Enterprise Name:EVERLUBE PRODUCTS
BU Name:EVERLUBE PRODUCTS
Street:100 COOPER CIRCLE
City:PEACHTREE CITY
Zip Code:GA 30269-3025
Country:USA
Phone Number:1-770-261-4819, 1-800-428-7802
Fax Number:1-770-261-4805
Internet:www.everlubeproducts.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 03-284
Type:sp01
Supply Short Name:CoMat 03-284 WELDING FILLER WIRE, Ni BASE
Supply Name:CoMat 03-284 WELDING FILLER WIRE, NiBASE
Specification Groups:
Doc NumberType
INCONEL 718 AMS 5832 AWS 5.14 MSRR9500/220
INCONEL 718 AMS 5832 AWS 5.14CLASS ER NI FE Cr-2 OMAT:3/206
INCONEL 718 AMS 5832 AWS 5.14CLASS ER NI FE Cr-2
Suppliers:
ManufacturerRemarks
LOCAL
28553
IE137
08489
IE508
0ZDB5
2R602
55596
58401
80357
K6835
Manufacturer Code:8F024
Supply Number:CoMat 10-130
Type:sp01
Supply Short Name:CoMat 10-130 ANTIGALLING COMPOUND
Supply Name:CoMat 10-130 ANTIGALLING COMPOUND
Specification Groups:
Doc NumberType
PWA 36545EVERLUBE ESNALUBE 382
Suppliers:
ManufacturerRemarks
8F024
Manufacturer Code:LOCAL
Tool Number:Silicon carbide wheel
Tool Name:Silicon carbide wheel