TASK 72-50-25-300-023 LPT Outer Diffuser Segment - Blend Repair, Repair 023 (VRS4280)

DMC:V2500-A0-72-50-2501-01A-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 72-50-25-300-023 LPT Outer Diffuser Segment - Blend Repair, Repair 023 (VRS4280)

Effectivity

FIG/ITEM

PART NO.

01-200

3A1791

Material of component

PART IDENT

SYMBOL

MATERIAL

Outer diffuser assembly segment

INCONEL 939B

General

Price and availability - none

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

NOTE

Equivalent materials or equipment may be used.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

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

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-25-350-061 General Instructions for the Blend Repair of the Outer Diffuser Assembly Segment

      1. Blend the nicks, dents and the pits of outer diffuser assembly segment.

      1. Use files and stones to remove the nicks, dents and pits.

      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 72-50-25-350-062 Blend Repair the Outer Diffuser Assembly Segment

      NOTE

      1. Keep the removal of material to the minimum necessary to remove the damage.

      2. For the local blending use a length to depth ratio of 5:1 minimum. Refer to Figure.

      3. Unless specified differently, there is no limit for the number of blends. If there is a number of damage marks together, blend the whole area to the specified depth. The minimum distance between the blends is 0.500in. (12.7 mm).

      1. Blend repair in area A1.

      1. The maximum permitted depth of blend repair is 0.008in. (0.20 mm).

      2. Blend repair in area A2.

      1. Remove the lifted material only.

      3. Blend repair the holes and the locating pins.

      1. Remove the lifted material only.

    3. SUBTASK 72-50-25-230-067 Examine the Outer Diffuser Assembly Segments for Cracks

      1. Do the test for cracks.

      1. No cracks are permitted.

    4. SUBTASK 72-50-25-220-109 Do the Post Repair Inspection

      1. Examine the surface finish.

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

      2. Examine the blend repaired areas dimensionally.

      1. Refer to Figure.

        Use dial caliper and external dial caliper to measure the dimensions of the blended areas.

        The blend ratio must be in the limits given in SUBTASK 72-50-25-350-002.

        Use the radius gage set to measure the radii of the blended areas.

    5. Figure: Blend repair of the outer diffuser assembly segment

    Blend repair of the outer diffuser assembly segment

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:External dial caliper
Tool Name:External 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