TASK 72-50-21-300-023 LPT Case - Nickel Plate The Location Pin Holes At The Front And/or Rear Flange, Repair-023 (VRS4034)

DMC:V2500-A0-72-50-2101-00A-647A-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 72-50-21-300-023 LPT Case - Nickel Plate The Location Pin Holes At The Front And/or Rear Flange, Repair-023 (VRS4034)

Effectivity

FIG/ITEM

PART NO.

01-010

3A0807

01-010

3A0990

01-010

3A0991

01-010

3A1908

01-010

3A2183

01-010

3A2265

01-010

3A2447

01-010

3A2533

Material of component

DESCRIPTION

SYMBOL

MATERIAL

LP turbine case

Inconel 718

General

Price and availability - none

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

NOTE

  1. For equipment and materials necessary to do this repair refer to SPM TASKS given below:

    70-09-00-400-501

    70-11-03-300-503

    70-23-05-230-501

    70-33-06-300-503

    70-38-24-380-501.

  2. Equivalent equipment may be used.

NOTE

The repair of the locating pin bore at the rear flange of the LP turbine case can only be done when the flared-over locating pin is removed, refer to VRS4002, TASK 72-50-21-300-002 (REPAIR-002).

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Crack detection kit (fluorescent)LOCALCrack detection kit (fluorescent)
Dial bore gageLOCALDial bore gage
OvenLOCALOven

Electric

Roughness microtesterLOCALRoughness microtester
Unltraviolet lampLOCALUltraviolet lamp
Vapor degreaserLOCALVapor degreaser
Vibrating marking pencilLOCALVibrating marking pencil

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-21-320-051 Machine the Location Pin Hole Diameters

      1. Machine the diameter D1 and/or diameter D2.

      1. Refer to Figure and to Figure.

        Keep material removal of diameter D1 and/or diameter D2 to the minimum to allow subsequent repairs.

        Remove all the damage.

    2. SUBTASK 72-50-21-220-077 Examine the Machined Diameter

      1. Dimensionally examine.

      1. For diameter D1 refer to Figure and for diameter D2 refer to Figure.

        Use dial bore gage and roughness microtester.

    3. SUBTASK 72-50-21-230-061 Examine the Machined Surfaces for Cracks

      1. Do the test for cracks.

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

        Use medium sensitivity level.

        No cracks are permitted.

        Use ultraviolet lamp and crack detection kit (fluorescent).

    4. SUBTASK 72-50-21-110-058 Clean the LP Turbine Case

      1. Aqueous degrease.

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

    5. SUBTASK 72-50-21-330-051 Prepare the Surfaces for the Nickel Plate Procedure

      1. Mask all areas without surfaces of diameter D1 and/or D2 and bore chamfers.

      1. Make sure that all surfaces not to be plated have full protection.

        Refer to the SPM TASK 70-38-24-300-503.

        Refer to Figureand Figure.

    6. SUBTASK 72-50-21-330-052 Nickel Plate the Prepared Surfaces

      1. Nickel plate the surfaces and bore chamfers of diameter D1 and/or D2.

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

        The maximum diameter D1 (nickel plated) is 0.243in. (6.17 mm), refer to Figure.

        The maximum diameter D2 (nickel plated) is 0.176in. (4.47 mm), refer to Figure.

    7. SUBTASK 72-50-21-330-053 Remove the Protection from the Masked Surfaces

      1. Remove all the masking.

      1. No signs of masking are permitted.

    8. SUBTASK 72-50-21-110-059 Clean the LP Turbine Case

      1. Aqueous degrease.

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

    9. SUBTASK 72-50-21-370-051 Heat Treat after Nickel Plate Repair

      1. Heat treat the LP turbine case.

      1. Use electrical oven.

        Put the LP turbine case for three hours in the electrical oven.

        The temperature must be 375 deg F (190 deg C).

    10. SUBTASK 72-50-21-320-052 Machine the Plated Surfaces

      1. Machine the diameter D1 and/or diameter D2 and the bore chamfers.

      1. For dimensions at diameter D1 refer to Figure and for dimension at diameter D2 refer to Figure.

    11. SUBTASK 72-50-21-110-060 Clean the LP Turbine Case

      1. Aqueous degrease.

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

    12. SUBTASK 72-50-21-220-078 Do the Post Repair Inspection

      1. Dimensionally examine the machined areas.

      1. For dimensions at diameter D1 refer to Figure and for dimensions at diameter D2 refer to Figure.

        Use dial bore gage and roughness microtester.

      2. Visually examine the machined areas.

      1. Chipped or flaked material, cracks or unmachined plated surfaces are permitted.

        Use illuminated magnifier.

    13. SUBTASK 72-50-21-350-062 Make a Mark to Identify the Repair

      1. Vibropeen VRS4034 and applicable beehive symbol adjacent to the part number.

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

        Use vibrating marking pencil.

    14. SUBTASK 72-50-21-350-063 Install the Flared-over Location Pin on to the Rear Flange of the LP Turbine Rear Case

      NOTE

      When the rear flange location pin bore has been repaired install the rear flange location pin again.

      1. Install the flared-over locating pin.

      1. Refer to VRS4002 TASK 72-50-21-300-002 (REPAIR-002).

    15. Figure: Dimensions for the repair of the locating pin hole at the front flange of the LP turbine case

    Sheet 1

    Legend
    Dimensions for the repair of the locating pin hole at the front flange of the LP turbine case

    Sheet 1

    Close

    Figure: Dimensions for the repair of the locating pin hole at the front flange of the LP turbine case

    Sheet 2

    Legend
    Dimensions for the repair of the locating pin hole at the front flange of the LP turbine case

    Sheet 2

    Close

    Figure: Dimensions for the repair of the locating pin hole at the rear flange of the LP turbine case

    Sheet 1

    Legend
    Dimensions for the repair of the locating pin hole at the rear flange of the LP turbine case

    Sheet 1

    Close

    Figure: Dimensions for the repair of the locating pin hole at the rear flange of the LP turbine case

    Sheet 2

    Legend
    Dimensions for the repair of the locating pin hole at the rear flange of the LP turbine case

    Sheet 2

    Close

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
Tool Number:Crack detection kit (fluorescent)
Tool Name:Crack detection kit (fluorescent)
Manufacturer Code:LOCAL
Tool Number:Dial bore gage
Tool Name:Dial bore gage
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Manufacturer Code:LOCAL
Tool Number:Roughness microtester
Tool Name:Roughness microtester
Manufacturer Code:LOCAL
Tool Number:Ultraviolet lamp
Tool Name:Unltraviolet lamp
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