TASK 72-50-00-300-011 LPT Stage 6 Inner Air Seal - Blend Repair the Knife Edge Seal of the Stage 6 Turbine Inner Airseal, Repair 011 (VRS4628)

DMC:V2500-A0-72-50-0021-05A-649A-C|Issue No:003.00|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 72-50-00-300-011 LPT Stage 6 Inner Air Seal - Blend Repair the Knife Edge Seal of the Stage 6 Turbine Inner Airseal, Repair 011 (VRS4628)

Effectivity

FIG/ITEM

PART NO.

01-0240

3A3047

Material of component

DESCRIPTION

IAE

SYMBOL

MATERIAL

Stage 6 turbine inner air seal

Inconel 718

General

Price and availability - none

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

NOTE

  1. For more equipment and materials necessary to do this repair 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 72-50-00-350-004 Blend Repair the Knife Edge Seal of the Stage 6 Turbine Inner Airseal

      NOTE

      1. Refer to SPM TASK 70-35-21-350-501 for blending surface damage.

      2. Do not try to make straight bent knife edge seal.

      3. All blended areas on the knife edge seal must not be more than total 0.017 sq in. (11,0 sq mm).

    1. Refer to Figure.

      2. Blend repair in area A1.

      1. Keep minimum remaining knife edge height of 0.0177 in. (0,45 mm).

    2. SUBTASK 72-50-00-230-002 Examine the Blended Areas for Cracks

      1. Do the test for cracks

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

      2. Use ultra high sensitivity level.

      3. No cracks are permitted.

    3. SUBTASK 72-50-00-220-002 Do the Post Repair Inspection

      1. Examine the surface of the blended areas visually

      1. The blended surface must be as smooth as the initial surface.

      2. Edges and corners are not permitted.

    4. SUBTASK 72-50-00-350-004 Do the Post Repair

      1. Rebalance the stage 6 inner air seal.

      1. Refer to VRS4630, TASK 72-50-00-300-013 (REPAIR-013).

    5. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
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