TASK 72-50-32-300-021 LPT Stage 4 Blade - Blend Repair Cracks In The Shroud Notch Radius, Repair-021 (VRS4199)

DMC:V2500-A0-72-50-3204-02A-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 72-50-32-300-021 LPT Stage 4 Blade - Blend Repair Cracks In The Shroud Notch Radius, Repair-021 (VRS4199)

Effectivity

FIG/ITEM

PART NO.

01-150

3A0884

Material of component

RR

DESCRIPTION

SYMBOL

MATERIAL

Stage 4 turbine blade

Inconel 713C

General

Price and availability - none

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

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Dial caliperLOCALDial caliper
Illuminated comparator magnifierLOCALIlluminated comparator magnifier
Radius gage setLOCALRadius gage set

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-32-350-073 General Instructions for the Blend Repair of the Shroud Notch Radius Cracks of the Stage 4 Turbine Blade (01-150)

      1. Blend the cracks on the shroud notches of the stage 4 turbine blade.

      1. Use files and stones to remove the cracks.

      2. Polish the blended areas.

      1. Use fine stones to make the blended surface as smooth as the initial surface. Edges and corners are not permitted.

    2. SUBTASK 72-50-32-350-074 Blend Repair the Shroud Notch Radius Cracks of the Stage 4 Turbine Blade (01-150)

      NOTE

      Do not change the shroud angles or other shroud dimensions by blend repair.
      Keep the removal of material to the minimum necessary to remove the damage.
      Refer to Figure or Figure when you do the blend repair. Only one option can be applied to one notch radius.
      Do not use rotating handtools.

      1. Blend repair the shroud notches.

      1. Refer to Figure or Fig. 72-50-32-990-035 for the maximum permitted depth of the blend repairs.

    3. SUBTASK 72-50-32-230-067 Examine the Shroud Notch of the Stage 4 Turbine Blade (01-150) for Cracks

      1. Do the test for cracks.

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

        No cracks are permitted.

    4. SUBTASK 72-50-32-220-097 Do the Post Repair Inspection

      1. Examine the surface finish.

      1. Use illuminated comparator magnfier.

        The surface finish of all repairs must be as good as the adjacent areas.

      2. Examine the blend repaired areas dimensionally.

      1. Use dial caliper and radius gage set to measure the blended areas.

        The limits are given in Figure or Figure.

    5. Figure: Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Figure: Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Figure: Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Figure: Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

    Blend repair of shroud notch radius cracks of the stage 4 turbine blade (01-150)

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:Dial caliper
Tool Name:Dial caliper
Manufacturer Code:LOCAL
Tool Number:Illuminated comparator magnifier
Tool Name:Illuminated comparator magnifier
Manufacturer Code:LOCAL
Tool Number:Radius gage set
Tool Name:Radius gage set