TASK 72-50-53-300-048 Turbine Exhaust Case (TEC) - Replace The Strut, Repair-048 (VRS3064)

DMC:V2500-A0-72-50-5301-12A-920A-C|Issue No:002.00|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 72-50-53-300-048 Turbine Exhaust Case (TEC) - Replace The Strut, Repair-048 (VRS3064)

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

Material of component

PART IDENT

SYMBOL

MATERIAL

Turbine exhaust case

-

Corrosion and heat resistant steel

General

Price and availability - none

Before strut removal, secure the dimensional relationship between the inner and outer stand-up reference features. This will prevent movement of the parts.

As necessary, remove any adjacent hardware, which will interfere with or be affected by the strut replacement such as tubing, mount rail bushings or nut plate details.

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

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
ScriberLOCALScriber1
Hand-held cut-off wheelLOCALHand-held cut-off wheel1

(or other suitable grinder)

Aluminum oxide rag wheelLOCALAluminum oxide rag wheel1
Stainless steel wire brushLOCALStainless steel wire brush1

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-378 WELDING WIRELOCALCoMat 03-3781
CoMat 06-064 FLUORESCENT PENETRANT (WATER WASHABLE MEDIUM SENSITIVITY)LOCALCoMat 06-0641

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Strut2A3508-01A/R
Strut2A3509-01A/R
Strut2A3510-01A/R

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-350-182 Scribe the Damaged Strut

    1. Refer to: Figure

      2. Put the exhaust case (21-300) on a bench. Scribe the damaged strut as follows:

        1. Scribe the cut short cut line adjacent to the strut attachment welds on both concave and convex sides of damaged strut at the strut leading edge and trailing edge.

        1. Refer to Figure.

          NOTE

          Make sure the line is scribed on the strut to be replaced, not on the strut stand-up.

      2. Use a straight-edge and scriber and connect the scribed lines to get a referenced cutting plane line.

    2. SUBTASK 72-50-53-350-183 Cut the Damaged Strut

      WARNING

      USE EYE PROTECTION WHEN YOU USE A CUT-OFF WHEEL OR GRINDER OR INJURY TO THE PERSON COULD OCCUR.

      CAUTION

      DO NOT REMOVE MORE THAN ONE STRUT AT A TIME.

      1. Cut the damaged strut along the scribed lines and remove the damaged strut from case.

      1. Use a hand-held cut-off wheel or other suitable grinder.

    3. SUBTASK 72-50-53-320-141 Machine the Unwanted Material

      1. Machine the unwanted material at strut cut planes to the initial lug dimensions.

      1. Refer to Figure.

    4. SUBTASK 72-50-53-320-142 Machine the Material to Fit the Replacement Strut

      1. Machine off the material from the outer end of the strut to fit the replacement strut.

      1. The gap between the fitted parts must not be more than 0.060 in. (1.524 mm).

        NOTE

        The replacement strut detail has been manufactured with approximately 0.040 in. (1.016 mm) additional material on the inner diameter. This material may or may not have to be removed for proper fit.

    5. SUBTASK 72-50-53-320-143 Polish the Surfaces to be Welded

      1. Polish the surfaces to be welded to give a good finish.

      1. Use an aluminum oxide rag wheel.

    6. SUBTASK 72-50-53-110-146 Clean Areas to be Welded

      1. Clean the areas to be welded.

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

    7. SUBTASK 72-50-53-350-184 Weld the Replacement Strut

      1. Use the manual gas tungsten arc (TIG) method to weld the replacement strut to the stand-ups as follows:

        1. Tack weld the strut in place every 1.50 - 2.00 in. (38.1 - 50.8 mm) at both inner and outer stand-ups.

      2. Remove the clamping constraining device used to secure the case dimensional features from shifting when you remove the strut.

        3. Weld the replacement strut to the stand-ups.

        1. Refer to the SPM TASK 70-31-02-310-501-001.

          Refer to Figure.

          NOTE

          These welds must be blended and be continuous.

        4. As necessary, replace any other damaged struts one at a time.

        1. Use the same procedure as above.

    8. SUBTASK 72-50-53-230-122 Do a Fluorescent Penetrant Inspection

      1. Optional: Do a fluorescent penetrant inspection of the weld areas.

    9. SUBTASK 72-50-53-370-091 Do a Local Stress Relief

      1. Do a local stress relief to the welded areas.

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

        Use cycle 6A.

        NOTE

        Furnace stress relieve permitted but subsequent full fluorescent penetrant inspection is necessary.

    10. SUBTASK 72-50-53-230-123 Do a Fluorescent Penetrant Inspection

      1. Do a fluorescent penetrant inspection of the repaired areas.

      1. Refer to the SPM TASK 70-23-05-230-501.

        No cracks are permitted.

        NOTE

        Fluorescent penetrant inspection of the entire case is necessary if full stress relieve was used.

    11. SUBTASK 72-50-53-320-144 Machine Tube Holes

      1. Machine the tube holes in the strut assembly.

    12. SUBTASK 72-50-53-110-147 Clean the Part

      1. Clean the part.

      1. Refer to the SPM TASK 70-11-01-300-503.

    13. SUBTASK 72-50-53-220-240 Examine the Strut Assembly

      1. Do a dimensional inspection of the strut assembly.

    14. SUBTASK 72-50-53-350-191 Identify the Repair

      1. Mark VRS3064 adjacent to the part number.

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

        Use vibration peening or engraving method.

        Remove metal lifted by the marking.

    15. SUBTASK 72-50-53-350-185 Close Up

    1. If any mount rail bushings or nut-plate detail parts were removed to permit the welding or local stress relieve, install the details in accordance with the applicable repairs.

    2. Make sure all other engine manual requirements are met.

    16. Figure: Repair struts on the turbine exhaust case

    Sheet 1

    Legend
    Repair struts on the turbine exhaust case

    Sheet 1

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 2

    Legend
    Repair struts on the turbine exhaust case

    Sheet 2

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 3

    Legend
    Repair struts on the turbine exhaust case

    Sheet 3

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 4

    Legend
    Repair struts on the turbine exhaust case

    Sheet 4

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 5

    Legend
    Repair struts on the turbine exhaust case

    Sheet 5

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 6

    Legend
    Repair struts on the turbine exhaust case

    Sheet 6

    Close

    Figure: Repair struts on the turbine exhaust case

    Sheet 7

    Legend
    Repair struts on the turbine exhaust case

    Sheet 7

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Link not Found
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Link not Found
Link not Found
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:Aluminum oxide rag wheel
Tool Name:Aluminum oxide rag wheel
Manufacturer Code:LOCAL
Tool Number:Hand-held cut-off wheel
Tool Name:Hand-held cut-off wheel
Manufacturer Code:LOCAL
Tool Number:Scriber
Tool Name:Scriber
Manufacturer Code:LOCAL
Tool Number:Stainless steel wire brush
Tool Name:Stainless steel wire brush