TASK 72-50-22-300-145 LPT Stage 4 Vane - Touch-Up Coat Repair, Repair-145 (VRS4615)

DMC:V2500-A0-72-50-2204-09A-609A-C|Issue No:003.00|Issue Date:2019-05-01

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 72-50-22-300-145 LPT Stage 4 Vane - Touch-Up Coat Repair, Repair-145 (VRS4615)

Effectivity

FIG/ITEM

PART NO.

01-550

3A3105

01-550

3A3119

Material of Component

PART IDENT

IAE SYMBOL

MATERIAL

Stage 4 turbine vane

M-247LC DS

General

Price and availability - none

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

Make sure that the necessary cleaning and inspection procedures are done before this repair.

NOTE

For more equipment and materials necessary to do this repair refer to SPM TASK 70-37-27-370-501 and TASK 70-38-14-380-501.
Equivalent equipment may be used.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-22-330-004 Prepare the Material and Surfaces

      1. Prepare the material and the surface.

      1. Refer to SPM TASK 70-38-14-380-501.

    2. SUBTASK 72-50-22-380-004 Touch-Up Coating of the Stage 4 Turbine Vane

    1. Refer to Figure.

      2. Apply coating in area A1.

      1. Refer to SPM TASK 70-38-14-380-501.

    3. SUBTASK 72-50-22-370-006-001 Diffusion Heat Treatment of the Recoated Stage 4 Turbine Vane

      NOTE

      Before diffusion heat treatment remove the honeycomb, refer to Repair VRS4577 TASK 72-50-22-300-126 (REPAIR-126).
      After diffusion heat treatment replace the honeycomb, refer to Repair VRS4577 TASK 72-50-22-300-126 (REPAIR-126).

      NOTE

      Do the precipitation heat treatment after all braze operations.

      1. Diffuse the recoated stage 4 turbine vane

      1. Refer to SPM TASK 70-38-14-380-501.

      2. Precipitation heat treat the stage 4 turbine vane.

      1. Refer to SPM TASK 70-37-27-370-501, except temperature range to be 1625 deg F to 1675 deg F (885 deg C to 913 deg C) for eight hours.

    4. SUBTASK 72-50-22-370-006-002 Diffusion Heat Treatment of the Recoated Stage 4 Turbine Vane

      NOTE

      Precipitation heat treatment is not necessary.

      1. Diffuse the recoated stage 4 turbine vane.

      1. Refer to SPM TASK 70-38-14-380-501 except diffusion heat treat at 1575 deg F to 1625 deg F (857 deg C to 885 deg C) for two hours.

    5. SUBTASK 72-50-22-220-017 Do the Post Repair Inspection

      1. Examine the recoated areas.

      1. Refer to SPM TASK 70-38-14-380-501.

    6. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised common information. Revised subtask. (13VM507A)