TASK 72-50-53-300-073 Turbine Exhaust Case (TEC) - Repair Cracks On The Case, Repair-073 (VRS3522)

DMC:V2500-A0-72-50-5301-01A-627A-C|Issue No:002.00|Issue Date:2014-05-01

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 72-50-53-300-073 Turbine Exhaust Case (TEC) - Repair Cracks On The Case, Repair-073 (VRS3522)

Effectivity

FIG/ITEM

PART NO.

21-300

2A1209-01

21-300

2A2620-01

21-300

2A3111-01

21-300

2A3183-01

21-300

2A3455-01

21-300

2A3183-101

21-300

2A4258-01

21-300

2A4263-01

02-300

4B8060

02-300

4B8068

Material of component

PART IDENT

IAE

SYMBOL

MATERIAL

Turbine exhaust case

AMS 5616 stainless steel

General

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
DrillLOCALDrill

0.084 - 0.104 in. (2.13 - 2.64 mm) diameter

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)LOCALCoMat 06-064
CoMat 03-378 WELDING WIRELOCALCoMat 03-378

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-350-119 Rout Cracks in the Turbine Exhaust Case

    1. Refer to: Figure

      2. Rout cracks to remove them from the case.

      1. Remove the minimum amount of material.

    2. SUBTASK 72-50-53-320-111 Stop Drill the Cracks

    1. Refer to: Figure

      2. Stop drill both ends of the cracks.

      1. Use a drill that is 0.084 to 0.104 in. (2.13 to 2.64 mm) in diameter.

    3. SUBTASK 72-50-53-230-116 Fluorescent Penetrant Inspect the Turbine Exhaust Case

      1. Fluorescent penetrant inspect the case to make sure you removed the crack. Cracks must be completely removed.

    4. SUBTASK 72-50-53-110-115 Clean the Areas of the Turbine Exhaust Case to be Repaired

      1. Clean thoroughly the surfaces to be welded and the adjacent heat-affected area. If the cracks go through the case, clean the repair area on both the ID and OD of the case wall.

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

    5. SUBTASK 72-50-53-310-066 Weld to Repair the Cracks in the Turbine Exhaust Case

    1. Refer to: Figure

      2. Weld to repair the cracks and the drilled holes in the turbine exhaust case.

      1. Use CoMat 03-378 WELDING WIRE and the GTAW method.

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

    6. SUBTASK 72-50-53-350-120 Blend the Weld

      1. Blend the weld flush to 0.000 - 0.010 in. (0.000 - 0.254 mm) above the parent material.

      1. Make sure not to remove the adjacent parent material.

    7. SUBTASK 72-50-53-230-128 Optional, Fluorescent Penetrant Inspect the Repaired Areas

      1. Fluorescent penetrant inspect the repaired areas (optional). Use the medium sensitivity method.

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

    8. SUBTASK 72-50-53-370-078-001 Stress-Relieve the Turbine Exhaust Case (Locally)

      1. Locally stress relieve the case.

      1. Refer to the SPM TASK 70-37-13-370-501, Cycle 6A.

    9. SUBTASK 72-50-53-370-078-002 Stress-Relieve the Turbine Exhaust Case (Oven)

      1. Remove the helicoils at the bearing compartment cover and helicoils at the bearing jumper tube boss.

      1. VRS3014 TASK 72-50-53-300-046 (REPAIR-046) or VRS5392 TASK 72-50-53-300-008 (REPAIR-008).

      2. Remove the 13 nut plates at the inner rear flange.

      1. VRS3019 TASK 72-50-53-300-054 (REPAIR-054) or VRS5413 TASK 72-50-53-300-029 (REPAIR-029).

      3. Remove the three nut plates at the carbon seal flange.

      1. VRS3256 TASK 72-50-53-300-069 (REPAIR-069).

      4. Oven stress-relieve the case.

      1. Refer to the SPM TASK 70-37-13-370-501, Cycle 6A.

    10. SUBTASK 72-50-53-230-096-001 Fluorescent Penetrant Inspect the Repaired Areas (If Locally Stress-Relieved)

      1. Fluorescent penetrant inspect the repaired areas for cracks.

    11. SUBTASK 72-50-53-230-096-002 Fluorescent Penetrant Inspect the Turbine Exhaust Case (If Furnace Stress-Relieved)

      1. Fluorescent penetrant inspect the case.

    12. SUBTASK 72-50-53-380-060 Shotpeen the Weld Repaired Area (Optional for Inner Cone Weld Seam Crack Repair)

      1. Locally shotpeen the weld repaired areas.

      1. Refer to the SPM TASK 70-38-13-380-501.

        Use an intensity of 6A.

        Use shot type S-110.

        NOTE

        Shotpeen is optional if you weld repair the front outer fairing.

    13. SUBTASK 72-50-53-350-168 Install all Details if Removed

      1. Install the three nutplates at the carbon seal flange, if applicable.

      1. VRS3256 TASK 72-50-53-300-069 (REPAIR-069).

      2. Install the 13 nutplates at the inner rear flange.

      1. VRS3019 TASK 72-50-53-300-054 (REPAIR-054) or VRS5413 TASK 72-50-53-300-029 (REPAIR-029).

      3. Install the helicoils at the bearing compartment cover and the helicoils at the bearing jumper tube boss.

      1. VRS3014 TASK 72-50-53-300-046 (REPAIR-046) or VRS5392 TASK 72-50-53-300-008 (REPAIR-008).

    14. SUBTASK 72-50-53-220-216 Inspect the Dimensions of the Turbine Exhaust Case

      1. Dimensionally inspect the turbine exhaust case.

      1. Refer to TASK 72-50-53-200-000 (Inspection/Check-000).

    15. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 03-378
Type:sp01
Supply Short Name:CoMat 03-378 WELDING WIRE
Supply Name:CoMat 03-378 WELDING WIRE
Specification Groups:
Doc NumberType
AMS 5817GREEK ASCOLOY
Suppliers:
ManufacturerRemarks
LOCAL
2R602
55596
58401
Manufacturer Code:X222X
Supply Number:CoMat 06-064
Type:sp01
Supply Short Name:CoMat 06-064FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)
Supply Name:CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)
Specification Groups:
Doc NumberType
It is not permitted to mix the selected CoMat 06‐064 letter suffix material with other CoMat 06‐064 letter suffix materials.Where CoMat 06‐064 is specified with no suffix, use one of the CoMat 06‐064 letter suffix materials.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:LOCAL
Tool Number:Drill
Tool Name:Drill