TASK 72-50-32-300-008 LPT Stage 6 Blade - Blend Repair On The Knife Edges, Repair-008 (VRS4186)

DMC:V2500-A0-72-50-3206-01A-649A-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 72-50-32-300-008 LPT Stage 6 Blade - Blend Repair On The Knife Edges, Repair-008 (VRS4186)

Effectivity

FIG/ITEM

PART NO.

01-050

3A0886

01-050

3A1806

01-050

3A2704

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Stage 6 turbine blades

Inconel 713C

General

Price and availability - none

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

NOTE

For more equipment and materials necessary to do this repair refer to the SPM TASK 70-23-05-230-501 and SPM TASK 70-35-21-350-501.
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 72-50-32-350-060 Blend Repair the Knife Edge Seals of the Stage 6 Turbine Blades

      NOTE

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

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

      3. The total area of blends on each knife edge seal and on the set of blades must not be more than 0.124 sqin (80 sqmm). The repaired blades must be symmetrically distributed around the circumference.

    1. Refer to Figure.

      2. Blend repair the knife edges.

      1. The maximum permitted depth of the blend repair is 0.040 in. (1.0 mm).

    2. SUBTASK 72-50-32-230-060 Examine the Blended Areas for Cracks

      1. Do the test for cracks.

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

        Use high sensitivity level.

        No cracks are permitted.

    3. SUBTASK 72-50-32-220-090 Do the Post Repair Inspection

    1. Refer to Figure.

      2. Examine the surface of the blended areas visually.

      1. The blended surface must be as smooth as the initial surface. Edges and corners are not permitted.

    3. Examine the blended areas dimensionally.

    4. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Editorial correction due to conversion