TASK 72-50-53-300-034 No. 5 Bearing Front Thermal Heat Shield Segments - Weld Repair, Repair-034 (VRS3330)

DMC:V2500-A0-72-50-5303-00A-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 72-50-53-300-034 No. 5 Bearing Front Thermal Heat Shield Segments - Weld Repair, Repair-034 (VRS3330)

Effectivity

FIG/ITEM

PART NO.

21-062

2A1768-01

21-072

2A1769-01

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

No. 5 bearing heat shield

-

AMS 5510 stainless steel

segments

General

Price and availability - refer to IAE

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Silicon carbide wheelLOCALSilicon carbide wheel
Welding equipmentLOCALWelding equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-110-094 Clean the No. 5 Bearing Heat Shield Segments

      1. Clean the heat shield segments.

    2. SUBTASK 72-50-53-310-053 Weld Repair the No. 5 Bearing Heat Shield Segments

      1. Rout out cracks in the welds.

      1. Refer to Figure.

        There is no maximum length or quantity for cracks.

        Cracks in welds must be fully routed out.

        Cracks in the sheet metal do not have to be routed out.

    2. Clean the weld area with a silicon carbide wheel or equivalent.

      3. Weld the cracks by the manual gas tungsten arc method.

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

    3. SUBTASK 72-50-53-310-054 Weld Patches on Holes in the No. 5 Bearing Heat Shield Segments

      1. Machine to remove rough edges or distortion around holes.

      1. Refer to the SPM TASK 70-31-13-310-501 for size limits.

        The area you machine to remove damage can be any shape. The area must be in a 2.000 in. (50.800 mm) diameter circle.

        Inner and outer corner radii must be 0.250 in. (6.350 mm) or larger.

      2. Mechanically remove oxides that are in 0.300 in. (7.620 mm) of a machined hole.

      1. Use a silicon carbide abrasive wheel or equivalent.

      3. Make a patch to fit 0.000 to 0.005 in. (0.000 to 0.127 mm) loose in the machined hole.

      1. You can make the patch from parts of the same part number that were discarded. You can also make patches from AMS 5510 sheet stock that is 0.006 to 0.010 in. (0.153 to 0.254 mm) thick.

      4. Weld the patch in position.

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

    4. SUBTASK 72-50-53-220-170 Examine the No. 5 Bearing Heat Shield Segments after Weld Repair

      1. Inspect the heat shield segments after weld repair.

      1. Refer to TASK 72-50-53-200-000 (INSPECTION/CHECK-000).

    5. Figure: Weld repair the No. 5 bearing heat shield segments

    Weld repair the No. 5 bearing heat shield segments

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Silicon carbide wheel
Tool Name:Silicon carbide wheel
Manufacturer Code:LOCAL
Tool Number:Welding equipment
Tool Name:Welding equipment