TASK 72-50-31-840-001 LPT Stage 6 Disk - Blend To Remove The Correlation Marking, Rework-001 - SBE 72-0067

DMC:V2500-A0-72-50-3106-01A-649A-C|Issue No:001.00|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 72-50-31-840-001 LPT Stage 6 Disk - Blend To Remove The Correlation Marking, Rework-001 - SBE 72-0067

Effectivity

FIG/ITEM PART NO.

01-050

3A0066

Material of component

RR

DESCRIPTION SYMBOL MATERIAL

Stage 6 turbine disk

-

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 rework, refer to the SPM TASK 70-23-05-230-501.

  2. 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 72-50-31-350-076 General Instruction for Identification of the Correlation Marking

      NOTE

      1. The correlation marking can be located on the front or rear side of the disk.

      2. If the correlation marking touches the bolt holes, contact.

      IAE INTERNATIONAL AERO ENGINES
AG
      400 Main Street,
      East Hartford, CT 06108
      USA
      ATTN:  Head of Technical Services

    1. Identify the correlation marking.

    2. SUBTASK 72-50-31-350-077 General Instructions for the Blend Repair of the Correlation Marking

      1. Blend the correlation marking.

      1. Use files and stones to remove the correlation marking.

      2. Polish the blended area.

      1. Use files and fine stones to make the blended surface as smooth as the initial surface.

        Edges and corners are not permitted.

    3. SUBTASK 72-50-31-350-078 Remove the Correlation Marking

      NOTE

      Refer to SUBTASK 72-50-31-350-076 and SUBTASK 72-50-31-350-077 before you do the blend repair.

      1. Keep material removal to the minimum to remove correlation.

      2. For blending the length to depth blend ratio is 5:1 minimum, refer to Figure.

      3. Blend repair in circumferential direction only.

      1. Blend repair in area A1 or A2 to remove the correlation marking.

      1. Maximum permitted depth of blend repair is 0.006 in. (0.152 mm), Figure.

    4. SUBTASK 72-50-31-380-051 Polish the Blended Area A1 or A2

    1. Refer to: Figure

      2. Do the polishing.

      1. Use fine hand held stones to make the blended surface as smooth as the initial surface.

    5. SUBTASK 72-50-31-230-061 Do the Post Repair Inspection for Cracks

    1. Refer to: Figure

      2. Do the test for cracks.

      1. Examine the blended area.

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

        No cracks are permitted.

    6. Figure: Stage 6 turbine disk, position of correlation marking

    Stage 6 turbine disk, position of correlation marking

    Figure: Blending length to depth ratio

    Blending length to depth ratio

Requirements After Job Completion

Follow-On Conditions

NONE