TASK 75-24-49-300-010 LPT ACC Cooling Air Ducts - Replace the Tubes of the Lower Duct Assembly, Repair-010 (VRS4254)

DMC:V2500-A0-75-24-4911-02A-920A-C|Issue No:002.00|Issue Date:2017-08-01

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 75-24-49-300-010 LPT ACC Cooling Air Ducts - Replace the Tubes of the Lower Duct Assembly, Repair-010 (VRS4254)

Effectivity

FIG/ITEM

PART NO.

03-010

3A0698

03-010

3A1666

Material of component

DESCRIPTION

RR SYMBOL

MATERIAL

Cooling air duct,

3A0698 TiCu2 (Tubes)

assembly

TiAL6V4

3A1666 TiCu2 (Tubes)

X10CrNi

General

Price and availability - none.

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

NOTE

For more equipment and materials necessary to do this repair, refer to SPM TASK 70-31-13-310-501, SPM TASK 70-23-05-230-501.
Equivalent materials or equipment may be used.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
FurnaceLOCALFurnace
Magnifying glassLOCALMagnifying glass

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-246 WELDING MATERIALLOCALCoMat 03-246

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
TUBE - ASSEMBLY OF0AM533A1874
TUBE - ASSEMBLY OF0AM533A1875
TUBE - ASSEMBLY OF0AM533A1876
TUBE - ASSEMBLY OF0AM533A1877
TUBE - ASSEMBLY OF0AM533A1878
TUBE - ASSEMBLY OF0AM533A1879
TUBE - ASSEMBLY OF0AM533A1880
TUBE - ASSEMBLY OF0AM533A1881
TUBE - ASSEMBLY OF0AM533A1882
TUBE - ASSEMBLY OF0AM533A1883
TUBE - ASSEMBLY OF0AM533A1884
TUBE - ASSEMBLY OF0AM533A1885
TUBE - ASSEMBLY OF0AM533A1886
TUBE - ASSEMBLY OF0AM533A1887
TUBE - ASSEMBLY OF0AM533A1888
TUBE - ASSEMBLY OF0AM533A1889

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-350-087 Remove the Damaged Tube

      1. Cut of damaged tube.

      1. Refer to Figure for dimension and identification of tubes.

      2. Cut away tube end.

      1. Attach replacement tube in position, cut tube end on case as necessary.

      2. Refer to dimensions in Figure.

    2. SUBTASK 75-24-49-110-062 Clean the Back Tube End

      1. Clean the tube end.

      1. Use a soft cloth only.

    3. SUBTASK 75-24-49-220-064 Examine the Parts of Cracks

      1. Do the test for cracks.

      2. Possible cracks cause decrease in weld strength.

      3. Cut to remove, within dimensions in Figure.

    4. SUBTASK 75-24-49-110-063 Clean the Surfaces to be Welded

      1. Clean the surfaces to be welded.

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

      2. Dirty surfaces cause a reduction in weld strength.

    5. SUBTASK 75-24-49-310-051 Weld in the Replacement Tube

      NOTE

      Do the weld of titanium in a protective gas atmosphere to avoid impurities in weld seams, leading to premature cracked and reduction in fatigue strength.

      1. Weld replacement tube in to position, use tungsten inert gas method.

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

      2. For purity of welds, weld in a protective gas environment.

      4. Use applicable fixture.

    6. SUBTASK 75-24-49-220-065 Examine the Welds

      1. Examine the weld quality.

      1. Refer to TASK 70-31-13-310-501 for acceptance standards.

    7. SUBTASK 75-24-49-230-058 Examine the Repaired Areas for Cracks

      1. Do the test for cracks.

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

      2. No cracks are permitted.

    8. SUBTASK 75-24-49-370-053 Heat Treatment after the Repair

      1. Heat treat air cooling duct, assembly.

      1. Put the part in the Furnace for two hours at 887 deg F (475 deg C).

      2. Use Argon, or air, or vacuum.

    9. SUBTASK 75-24-49-230-059 Examine the Repaired Areas for Cracks

      1. Do the test for cracks.

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

      2. No cracks are permitted.

    10. SUBTASK 75-24-49-220-066 Do the Post Repair Inspection

      1. Dimensionally examine the repaired areas.

      1. Refer to dimensions in Figure.

      2. Examine air holes for blockage.

      1. Maximum one blocked hole per repaired tube is permitted.

    11. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised reference in illustrations. (editorial)

Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Part Number:3A1874
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1875
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1876
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1877
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1878
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1879
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1880
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1881
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1882
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1883
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1884
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1885
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1886
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1887
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1888
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Part Number:3A1889
Part Name:TUBE - ASSEMBLY OF
Manufacturer Code:0AM53
Manufacturer Code:LOCAL
Supply Number:CoMat 03-246
Type:sp01
Supply Short Name:CoMat 03-246 WELDING MATERIAL
Supply Name:CoMat 03-246 WELDING MATERIAL
Specification Groups:
Doc NumberType
B.S.TA22 DTD 5133 TIMETAL 230 TI-P11 WL3.7124.1
Suppliers:
ManufacturerRemarks
LOCAL
U9025
K6835
0MRR3
Manufacturer Code:LOCAL
Tool Number:Furnace
Tool Name:Furnace
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