TASK 72-50-53-300-024 Turbine Exhaust Case (TEC) - Chromium Plate The No. 5 Bearing Seat, Repair-024 (VRS5408)

DMC:V2500-A1-72-50-5301-04A-647A-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

V2500-A1

Common Information

TASK 72-50-53-300-024 Turbine Exhaust Case (TEC) - Chromium Plate The No. 5 Bearing Seat, Repair-024 (VRS5408)

Effectivity

FIG/ITEM PART No.

01-001

4A8014

01-001A

4A8025

Material of component

RR

DESCRIPTION SYMBOL MATERIAL

Turbine exhaust case

-

Corrosion and heat resistant

iron base alloy

General

Price and availability - none

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment
Grinding machineLOCALGrinding machine
FPI inspection stationLOCALFPI inspection station
BasketLOCALBasket
Process Plating TanksLOCALProcess plating tanks
FurnaceLOCALFurnace

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-320-065 Machine the No. 5 Bearing Seat

    1. Refer to Figure.

      2. If chrome plate was present.

      1. Remove the existing chrome plate by SPM TASK 70-33-02-100-501. If chrome plate was not removed completely by SPM TASK 70-33-02-100-501, grind to remove the chrome plate.

      3. If chrome plate was not present, machine to remove damage from the No. 5 bearing seat.

      1. The diameter must be between 5.527 to 5.537 in. (140.392 to 140.638 mm).

        Surface rough must be 32 micro-in. (0.8 micron) before plating.

        Remove all damage and wear.

        Keep the removal of material to the minimum necessary to remove the damage.

    2. SUBTASK 72-50-53-110-209 Clean the Turbine Exhaust Case

      1. Clean the turbine exhaust case.

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

    3. SUBTASK 72-50-53-230-151 Examine the Turbine Exhaust Case

      1. If grinding method was used to remove chromium plate, then do a local fluorescent penetrant inspection of the repair area.

      1. Refer to the SPM TASK 70-23-05-230-501. Use medium sensitivity, water washable. No cracks permitted.

    4. SUBTASK 72-50-53-110-210 Clean the Repair Area of the Turbine Exhaust Case

      1. Clean the repair area locally.

      1. Refer to the SPM TASK 70-11-26-300-503.

    5. SUBTASK 72-50-53-380-062 Apply a Mask to the Turbine Exhaust Case

      1. Apply a mask to the areas of the turbine exhaust case that are not to be plated.

      1. Refer to the SPM TASK 70-38-24-300-503.

    6. SUBTASK 72-50-53-330-057 Chromium Plate the No. 5 Bearing Seat

    1. Refer to Figure.

      2. Do the chromium plating.

      1. Refer to the SPM TASK 70-33-02-100-501.

        Plate to a sufficient thickness to permit the machining to the last dimension.

        The plate out of the seat is permitted but must be removed.

    3. Remove the mask.

    7. SUBTASK 72-50-53-380-063 Bake After Chromium Plating

      1. Bake the turbine exhaust case assembly after chromium plating.

      1. Refer to the SPM TASK 70-33-02-100-501.

        Do this process as soon as possible in less than four hours after chromium plate.

    8. SUBTASK 72-50-53-220-281 Examine the Turbine Exhaust Case

      1. Do a visual inspection of the plating for finish and bond.

      1. Refer to the SPM TASK 70-33-02-220-502.

    9. SUBTASK 72-50-53-320-066 Grind the No. 5 Bearing Seat

    1. Refer to Figure.

      2. Grind the seat of the No. 5 bearing.

      1. The last dimension of the seat must be between 5.5210 to 5.5230 in. (140.232 to 140.278 mm).

        Clean up the edges of groove and chamfer, where necessary.

    10. SUBTASK 72-50-53-110-211 Clean the Turbine Exhaust Case

      1. Clean the turbine exhaust case.

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

    11. SUBTASK 72-50-53-220-096 Examine the Chromium Plated Area

    1. Refer to Figure.

      2. Examine the turbine exhaust case after chromium plate.

      1. Refer to the SPM TASK 70-33-02-220-502.

    12. SUBTASK 72-50-53-350-061 Record the Repair

      1. Mark VRS5408 adjacent to the part number.

      1. Make a permanent mark by the procedure given in the SPM TASK 70-09-00-400-501. Use vibration peen method. Remove the metal lifted by marking the number.

    13. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Basket
Tool Name:Basket
Link not Found
Manufacturer Code:LOCAL
Tool Number:Furnace
Tool Name:Furnace
Link not Found
Manufacturer Code:LOCAL
Tool Number:Process plating tanks
Tool Name:Process Plating Tanks
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment