TASK 72-50-53-300-090 Turbine Exhaust Case (TEC) - Cracked R Rail Load Share Boss Attachment Holes - Weld Repair-090 (VRS3849)

DMC:V2500-A0-72-50-5301-05A-627A-C|Issue No:001.00|Issue Date:2019-11-01

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 72-50-53-300-090 Turbine Exhaust Case (TEC) - Cracked R Rail Load Share Boss Attachment Holes - Weld Repair-090 (VRS3849)

Effectivity

FIG/ITEM

PART NO.

21-300

2A1209-01

21-300

2A2620-01

21-300

2A3111-01

21-300

2A3183-01

21-300

2A3183-101

21-300

2A3455-01

21-300

2A4258-01

21-300

2A4263-01

Material of Component

DESCRIPTION

SYMBOL

MATERIAL

Turbine Exhaust Case Assembly

-

Corrosion and Heat Resistant Steel AMS5616

General

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

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all necessary cleaning and inspection procedures are done before this repair.
If necessary, remove all details from the part by the applicable repairs.

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-378 WELDING WIRELOCALCoMat 03-378AR

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-350-225 Rout the Crack(s) from the R Rail Load Share Boss Attachment Hole(s)

    1. Refer to Figure.

      2. Rout to completely remove the crack(s) from the part.

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

      2. Remove the minimum amount of parent material necessary to accomplish this repair.

    2. SUBTASK 72-50-53-110-214 Clean the R Rail Load Share Boss Attachment Hole(s)

      1. Clean the repair area(s).

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

    3. SUBTASK 72-50-53-230-152 Fluorescent Penetrant Inspect the Repair Area(s)

      1. Do a fluorescent penetrant inspection of repair area(s).

      1. Refer to SPM TASK 70-23-05-230-501. Use high sensitivity penetrant.

      2. No cracks or indications are permitted.

    4. SUBTASK 72-50-53-350-226 Prepare the Repair Area(s)

      1. Use a rotary austenitic stainless steel wire brush or silicon carbide abrasive wheel to remove oxides and prepare the area for welding.

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

    5. SUBTASK 72-50-53-110-215 Clean the Repair Area(s)

      1. Clean the repair area(s).

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

    6. SUBTASK 72-50-53-310-090 Weld Repair the Cracked R Rail Load Share Boss Holes

    1. Refer to Figure.

      2. Weld the repair area(s). Use the Manual Gas Tungsten Arc Weld (GTAW-MA) procedure.

      1. Refer to SPM TASK 70-31-13-310-501 (IAE 16-2). Use CoMat 03-378 WELDING WIRE.

    7. SUBTASK 72-50-53-370-107 Stress-Relieve the Repair Area

      1. Do a local stress relief of the repair area(s).

      1. Refer to SPM TASK 70-37-13-370-501.

    8. SUBTASK 72-50-53-210-061 Do a Hardness Check

    1. Do a hardness check on the surfaces adjacent to the welded area. Hardness must be 30 to 38 HRC or equivalent.

    9. SUBTASK 72-50-53-350-227 Finish Blend the Repair Area(s) - Face(s)

      1. Finish blend the welded area(s) flush on the face(s) of the R Rail(s) to 0.000 in. - 0.010 in. (0.000 mm - 0.254 mm) above the adjacent rail surface. See Figure.

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

    10. SUBTASK 72-50-53-320-178 Finish Machine the Repair Area(s) - Chamfer(s)

      1. Finish machine the welded area(s) in the attachment hole and the chamfer to the limits shown in Figure.

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

      2. Break edges 0.003 in. to 0.015 in. (0.077 mm to 0.381 mm).

      3. No mismatch permitted.

    11. SUBTASK 72-50-53-110-216 Clean the Repair Area(s)

      1. Clean the repair area(s).

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

    12. SUBTASK 72-50-53-230-153 Fluorescent Penetrant Inspect the Repair Area(s)

      1. Do a fluorescent penetrant inspection of the repaired area(s).

      1. Refer to SPM TASK 70-23-05-230-501. Use high sensitivity penetrant.

    13. SUBTASK 72-50-53-220-282 Do a Dimensional Inspection

    1. Refer to Figure.

    14. SUBTASK 72-50-53-350-228 Identify the Repair

      1. Mark VRS3849 adjacent to the part number.

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

    15. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Repair Details and Dimensions

    Legend
    1

    Repair Details and Dimensions

    2

    Repair Details and Dimensions

    1. R Rail Load Share Boss Attachment Holes.

    2. Damaged R Rail Load Share Boss Attachment Hole(s).

    3. 0.980 Inch (24.892 mm) Minimum, Reference.

    4. 0.194 - 0.198 Inch (4.928 - 5.029 mm) Diameter

    Chamfer 115 Degrees To 125 Degrees, 0.290 - 0.310 Inch (7.366 - 7.874 mm) Diameter at Surface CR

    5. 0.194 - 0.198 Inch (4.928 - 5.029 mm) Diameter

    Chamfer 115 Degrees To 125 Degrees, 0.290 - 0.310 Inch (7.366 - 7.874 mm) Diameter at Surface CR

    6. Chamfer: 0.020 - 0.040 Inch (0.508 - 1.016 mm) X 43 Degrees To 47 Degrees

    7. 0.152 - 0.162 Inch (3.861 - 4.114 mm), Reference.

    Close

    NOTE

    All dimensions apply when Surface CY and DA are flat in 0.005 in. (0.127 mm) and Diameters CW and CX maintain a clearance envelope of 38.6513 in. (981.7431 mm) and 33.0172 in. (838.6369 mm) respectively, in a free state or constrained. Constraint contact allowed only on Surfaces CY, CZ, DA, DB, and Diameters CW and CX.

    NOTE

    In a free state Surfaces CY and DA are flat in 0.005 in. (0.127 mm) and Diameters CW and CX are 38.607 in. - 38.704 in. (980.618 mm - 983.081 mm) and 32.983 in. - 33.059 in. (837.769 mm - 839.698 mm) respectively.

    NOTE

    Break edges 0.003 in. - 0.015 in. (0.077 mm - 0.381 mm).

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added new repair. (18VC425)

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