TASK 72-50-24-300-038 LPT Inner Diffuser Duct Support Ring - Replace Spacer Key, Repair-038 (VRS4356)

DMC:V2500-A0-72-50-2403-02A-920A-C|Issue No:003.00|Issue Date:2021-08-01

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 72-50-24-300-038 LPT Inner Diffuser Duct Support Ring - Replace Spacer Key, Repair-038 (VRS4356)

Effectivity

FIG/ITEM

PART NO.

01-170

3A1560

01-170

3A2523

Material of component

PART IDENT

IAE SYMBOL

MATERIAL

Support ring assy

MTS1155B or WL2.4650.7 / C263

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 the SPM TASK 70-11-34-300-503, SPM TASK 70-23-01-230-501, SPM TASK 70-23-02-230-501, SPM TASK 70-23-05-230-501, SPM TASK 70-31-06-310-501, SPM TASK 70-31-09-310-501, SPM TASK 70-31-13-310-501, SPM TASK 70-32-03-320-501 AND SPM TASK 70-33-06-300-503.
Equivalent equipment can be used.

NOTE

To identify the consumable materials refer to the OPCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Milling machineLOCALMilling machine
Grinding machineLOCALGrinding machine
Drilling machineLOCALDrilling machine

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-148 BRAZING FILLER POWDERLOCALCoMat 03-148
CoMat 03-227 WHITE STOP OFFD3309CoMat 03-227
CoMat 03-287 WELDING FILLER WIRELOCALCoMat 03-287
CoMat 03-184 WELDING FILLER WIRE, NICKELLOCALCoMat 03-184

optional

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
SPACER KEY3A011529

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-24-325-058 Remove the Worn Spacer Key

      1. Machine off the worn 3A0115 .

      1. Electrical discharge machine according to the SPM TASK 70-32-03-320-501 is permitted.

        Refer to Figure.

        Do not remove parent material.

        Remove traces of original braze filler before you braze in new 3A0115 .

    2. SUBTASK 72-50-24-110-078 Clean the Support Ring

      1. Aqueous degreas

      1. Refer to the SPM TASK 70-11-34-300-503.

    3. SUBTASK 72-50-24-230-068 Examine the Support Ring for Cracks

      1. Do the test for cracks.

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

        No cracks are permitted.

    4. SUBTASK 72-50-24-220-117 Examine the Machined Areas

      1. Examine dimensionally.

      1. Refer to Figure for dimensions.

    5. SUBTASK 72-50-24-310-057-001 Install the New Spacer Key

      1. Nickel plate the mating surfaces if necessary.

      1. Refer to the SPM TASK 70-33-06-300-503.

        Nickel plate is permitted to make the following braze cycle easier.

        Coating must be 0.0001 to 0.0003 in. (0.003 to 0.008 mm).

      2. Braze the 3A0115 in position.

      1. Clamp the 3A0115 to prevent movement.

        Refer to Figure.

        Refer to the SPM TASK 70-31-09-310-501 and SPM TASK 70-31-06-310-501 for braze cycle except steps 2E, 3A, 3B, 3C of the brazing procedure.

        Increase temperature of 1904 to 1940 deg F (1040 to 1060 deg C) and hold for 10 to 15 minutes.

        Cool at a minimum rate of 25 deg F per minute (14 deg C per minute ) to 1750 deg F (954 deg C).

        Cool at a rate of 45 deg F per minute (25 deg C per minute) or faster to 1112 deg F (600 deg C).

        Further cooling is optional.

      3. Precipitation heat treat the support ring.

      1. Put the support ring into a furnace at 1450 to 1500 deg F (788 to 816 deg C) for eight hours.

        Heating rate is not important.

        Cool in still or shaken in air or inert gas.

        NOTE

        Cooling cycle of Step can be mixed with precipitation heat treat cycle.

    6. SUBTASK 72-50-24-310-057-002 Install the New Spacer Key

      1. Weld the 3A0115 in position.

      1. Refer to the SPM TASK 70-31-13-310-501. Use CoMat 03-184 WELDING FILLER WIRE, NICKEL or CoMat 03-287 WELDING FILLER WIRE. Refer to Figure. No head treatment required after weld repair.

    7. SUBTASK 72-50-24-110-079 Clean the Support Ring

      1. Aqueous degrease

      1. Refer to the SPM TASK 70-11-34-300-503.

    8. SUBTASK 72-50-24-350-064 Machine the Support Ring after Brazing or Welding if Necessary

      1. Machine the support ring.

    9. SUBTASK 72-50-24-220-118 Examine the Installed Spacer Key

      1. Examine area for completeness of braze.

      1. Refer to the SPM TASK 70-31-09-310-501.

        No surplus braze material permitted.

      2. Examine dimensionally.

      1. Refer to Figure and Figure for dimensions.

    10. SUBTASK 72-50-24-230-069 Examine the Support Ring for Cracks

      1. Do the test for cracks.

      1. If 3A0115 have been welded only, SPM TASK 70-23-05-230-501, medium sensitivity is also acceptable.

        No cracks are permitted.

    11. SUBTASK 72-50-24-220-119 Examine the Hardface Coating for Damage

      1. Examine area for damaged or missing hardface coating.

      1. No damage permitted.

        Refer to Repair-039, VRS4309 TASK 72-50-24-300-039 and Repair-053, VRS4466 TASK 72-50-24-300-053 for hardface coating replacement.

    12. SUBTASK 72-50-24-280-051 Examine the Support Ring for Hardness

      NOTE

      Hardness check is not required if 3A0115 have been welded. If hardness is less than the minimum specified, do a subsequent heat treat as given in Step.

      1. Examine the support ring for hardness.

      1. Hardness to be 22 HRC minimum or equivalent.

    13. SUBTASK 72-50-24-370-053 Heat Treat the Support Ring

      NOTE

      Heat treatment is only required if hardness is less than the minimum specified. Refer to Step.

      1. Precipitation heat treat the support ring.

      1. Put the support ring into a furnace at 1450 to 1500 deg F (788 to 816 deg C) for eight hours. Heating rate is not important. Cool in still or shaken air or inert gas.

      2. Do a check of the support ring hardness again.

      1. Refer to Step.

        If minimum hardness is not obtained, repeat procedure in Step.

    14. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Sheet 1

    Legend
    Repair Details and Dimensions

    Sheet 1

    Close

    Figure: Repair Details and Dimensions

    Sheet 2

    Legend
    Repair Details and Dimensions

    Sheet 2

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised graphic. (Editorial)

Link not Found
Manufacturer Code:D3309
Enterprise Name:MTU MOTOREN-UND-TURBINE UNION MUNCHEN GMBH
BU Name:MTU MOTOREN-UND-TURBINE UNION MUNCHEN GMBH
Street:DACHAUERSTRASSE 665
P.O. Box:80995
City:MUNCHEN 50
Country:GERMANY
Phone Number:49-89-14890
Fax Number:49-89-1502621
Internet:www.mtu.de
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Supply Number:CoMat 03-148
Type:sp01
Supply Short Name:CoMat 03-148 BRAZING FILLER POWDER
Supply Name:CoMat 03-148 BRAZING FILLER POWDER
Specification Groups:
Doc NumberType
MSRR 9500/97NICROBRAZ LM NICROBRAZ LM (-150 MESH) AMS 4777 B.S.1845 HTN2
OMAT:3/181NICROBRAZ LM NICROBRAZ LM (-150 MESH) AMS 4777 B.S.1845 HTN2
JCR-214NICROBRAZ LM NICROBRAZ LM (-150 MESH) AMS 4777 B.S.1845 HTN2
Suppliers:
ManufacturerRemarks
LOCAL
63585
K6835
U0163
K5086
Manufacturer Code:0XPV7
Supply Number:CoMat 03-184
Type:sp01
Supply Short Name:CoMat 03-184 WELDING FILLER WIRE, NICKEL
Supply Name:CoMat 03-184 WELDING FILLER WIRE, NICKEL
Specification Groups:
Doc NumberType
MSRR9500/16C-263
OMAT:3/62C-263
Suppliers:
ManufacturerRemarks
0XPV7
28553
2R602
80357
IE306
K6970
Manufacturer Code:D3309
Supply Number:CoMat 03-227
Type:sp01
Supply Short Name:CoMat 03-227 WHITE STOP OFF
Supply Name:CoMat 03-227 WHITE STOP OFF
Specification Groups:
Doc NumberType
MTH 316NICROBRAZE WHITE STOP OFF
Suppliers:
ManufacturerRemarks
D3309
Manufacturer Code:LOCAL
Supply Number:CoMat 03-287
Type:sp01
Supply Short Name:CoMat 03-287 WELDING FILLER WIRE
Supply Name:CoMat 03-287 WELDING FILLER WIRE
Specification Groups:
Doc NumberType
INCONEL 625 AMS 5837 AMS 5837
Suppliers:
ManufacturerRemarks
LOCAL
2R602
55596
58401
Manufacturer Code:LOCAL
Tool Number:Drilling machine
Tool Name:Drilling machine
Link not Found
Manufacturer Code:LOCAL
Tool Number:Milling machine
Tool Name:Milling machine