TASK 75-24-49-300-037 LPT ACC Cooling Air Ducts - Blend Repair Surface Damage, Repair-037 (VRS4397)

DMC:V2500-A0-75-24-4911-01A-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 75-24-49-300-037 LPT ACC Cooling Air Ducts - Blend Repair Surface Damage, Repair-037 (VRS4397)

Effectivity

FIG/ITEM

PART NO.

02-010

3A2380

02-010

3A2656

02-010

3A2658

03-010

3A2410

03-010

3A2657

03-010

3A2659

Material of Component

PART IDENT

SYMBOL

MATERIAL

Air cooling duct upper

1.4544.9 / TiCu2

Air cooling duct lower

1.4544.9 / 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 number are in the SPM.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Radius gage setLOCALRadius gage set
Dial CaliperLOCALDial Caliper
Illuminated magnifier (portable)LOCALIlluminated magnifier (portable)

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-350-116 General Instructions for the Blend repair of the Air Cooling Duct (02-010 and 03-010)

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

      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.

      2. Edges and corners not permitted.

    2. SUBTASK 75-24-49-350-117 Blend Repair of the Air Cooling Duct (02-010 and 03-010),

      NOTE

      Keep material removal to the minimum to remove damage.
      For 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. Refer to Figure and Figure.

      2. Blend repair in area A1.

      1. Maximum permitted depth of blend repair is 0.006 in. (0.15 mm) for nicks.

      2. Remove only raised material for rounded dents.

      3. Blend repair in area A2 and all tubes.

      1. No blend repair necessary.

      2. Remove raised material only

      4. Blend repair in area A3.

      1. No blend repair necessary.

      2. Remove raised material only

    3. SUBTASK 75-24-49-230-117 Examine the Air Cooling Duct (02-010 and 03-010)

      1. Do the test for cracks.

      1. Examine all blended areas in accordance.

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

      3. Medium sensitivity

      4. No cracks permitted.

    4. SUBTASK 75-24-49-220-143 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.

      2. Refer to Figure.

      3. Measure the dimensions of the blended areas.

      4. The blend ration 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
Link not Found
Manufacturer Code:LOCAL
Tool Number:Illuminated magnifier (portable)
Tool Name:Illuminated magnifier (portable)
Manufacturer Code:LOCAL
Tool Number:Radius gage set
Tool Name:Radius gage set