TASK 75-24-49-300-004 LPT ACC Cooling Air Ducts - Blend Repair Surface Damage, Repair-004 (VRS4048)

DMC:V2500-A0-75-24-4911-00A-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 75-24-49-300-004 LPT ACC Cooling Air Ducts - Blend Repair Surface Damage, Repair-004 (VRS4048)

Effectivity

FIG/ITEM

PART NO.

02-010

3A0678

02-010

3A1501

02-010

3A1662

03-010

3A0698

03-010

3A1666

Material of component

DESCRIPTION

RR SYMBOL

MATERIAL

Air cooling duct, upper

TiCu2

Air cooling duct, lower

TiCu2

General

Price and availability

Refer to IAE for any of these items.

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

Related repairs - none

NOTE

Equivalent equipment may be used.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

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

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-350-055 General Instructions for the Blend Repair of the Air Cooling Duct (02-010 and 03-010)

      1. Blend the nicks, dents or pits of the air cooling duct.

      1. Use files and stones to remove the nicks, dents or 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 75-24-49-350-056 Blend Repair of the Air Cooling Duct (02-010 and 03-010)

      NOTE

      Keep material removal to the minimum to remove damage.
      For local blending, use a length to depth ratio of 5:1 minimum (refer to Figure).
      Unless stated 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. Minimum distance between blends is 0.500 in. (12.7 mm).

      1. Blend repair in area A1.

      1. Maximum permitted depth of blend repair is 0.006 in. (0.15 mm) for nicks. Remove only raised material for rounded dents.

      2. Blend repair in area A2 and all tubes.

      1. No blend repair necessary.

      2. Remove raised material only.

      3. Blend repair in area A3.

      1. No blend repair necessary.

      2. Remove raised material only.

    3. SUBTASK 75-24-49-230-056 Examine the Air Cooling Duct (02-010 and 03-010)

      1. Do the test for cracks.

      1. Examine all blended areas in accordance with the SPM TASK 70-23-05-230-501.

      2. No cracks are permitted.

    4. SUBTASK 75-24-49-220-075 Do the Post Repair Inspection of the Air Cooling Duct (02-010 and 03-010)

      1. Examine the surface finish.

      2. The surface finish of all repairs must be as good as surrounding areas.

      2. Examine the blend repaired areas dimensionally.

      1. Refer to Figure.

      3. Measure the dimensions of the blended areas.

      4. The blend ratio must be in the limits given in Step

    5. Figure: Blend Repair of the Air Cooling Duct

    Blend Repair of the Air Cooling Duct

    Blend Repair of the Air Cooling Duct

Requirements After Job Completion

Follow-On Conditions

NONE
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