TASK 75-24-49-300-006 LPT ACC Cooling Air Ducts - Replace the Front and Rear Supports, Nuts, and Rivets, Repair-006 (VRS4248)

DMC:V2500-A0-75-24-4911-00A-920A-C|Issue No:004.00|Issue Date:2018-11-01

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 75-24-49-300-006 LPT ACC Cooling Air Ducts - Replace the Front and Rear Supports, Nuts, and Rivets, Repair-006 (VRS4248)

Effectivity

FIG/ITEM

PART NO.

02-010

3A0678

02-010

3A1501

02-010

3A1662

02-010

3A2656

02-010

3A2658

03-010

3A0698

03-010

3A1666

03-010

3A2657

03-010

3A2659

Material of component

DESCRIPTION

IAE SYMBOL

MATERIAL

Upper/lower air cooling duct assembly

Ti6Al-4V

Upper/lower air cooling duct assembly

X10

General

Price and availability - none.

This TASK describes the repair of the upper and lower air cooling duct assemblies with subsequence separated items as follows:

Replacement of the universal head solid rivets or of the countersink head solid rivets, refer to Step or Step.

Replacement of the anchor nuts, refer to Step .

Replacement of the clip nuts, refer to Step.

Replacement of the front or rear supports, refer to Step or Step and to Step.

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

NOTE

For more equipment and materials necessary to do this repair, refer to SPM TASK 70-23-05-230-501 and SPM TASK 70-39-03-390-501.
Equivalent equipment may be used.

Repair parts

FIG/ITEM

PART NO.

PART IDENT

QTY

ITEM

02-200

4032806

Anchor nut

2

1

02-200

4W0043

Clip Nut

2

2

02-205

3A0622

Countersink head solid rivet

4

3

02-210

AN123291

Universal head solid rivet

8

4

02-215

3A0165

Front support

1

5

02-215

3A2402

Front support

1

6

02-220

3A0164

Rear support

1

7

02-220

3A2421

Rear support

1

8

03-200

4032806

Anchor nut

2

1

03-200

4W0043

Clip nut

2

2

03-205

3A0622

Countersink head solid rivet

4

3

03-210

AN123291

Universal head solid rivet

8

4

03-215

3A0165

Front support

1

5

03-215

3A2402

Front support

1

6

03-220

3A0164

Rear support

1

7

03-220

3A2421

Rear support

1

8

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Grinder, hand held pneumaticLOCAL

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-350-059 Replace the Universal Head Solid Rivets (ITEM 4)

    1. Refer to Figure and Figure.

      2. Grind off formed rivet heads of the universal head solid rivets.

      1. Do not damage the upper and lower air cooling duct assemblies.

      3. Hit lightly the remaining material of the shaft and dowel.

      1. Use minimal of force to avoid damage of the upper and lower air cooling assemblies.

      4. Examine the inner diameter of the holes dimensionally.

      1. Maximum diameter should not be more than 0.169 in. (4.30 mm).

      5. Do the test for cracks.

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

      2. Use medium sensitivity level.

      3. No cracks are permitted.

      6. Install the new universal head solid rivets.

      1. Refer to SPM TASK 70-39-03-390-501.

    2. SUBTASK 75-24-49-350-060 Replace the Countersink Head Solid Rivets (ITEM 3)

    1. Refer to Figure.

      2. Grind off the formed rivet heads of the countersink head solid rivets.

      1. Do not damage the anchor nuts and the front support.

      3. Hit lightly the remaining material of the shaft and dowel.

      1. Use minimal of force to avoid damage of the anchor nuts and the front support.

      4. Examine the diameter of the holes dimensionally.

      1. Maximum diameter should not be more than 0.169 in. (4.30 mm).

      5. Do the test for cracks.

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

      2. Use medium sensitivity level.

      3. No cracks are permitted.

      6. Install the new universal head solid rivets.

      1. Refer to SPM TASK 70-39-03-390-501.

      2. The head surfaces of the countersink head rivets must be below of the front support surface.

    3. SUBTASK 75-24-49-350-061 Replace the Anchor Nuts (ITEM 1)

    1. Refer to Figure .

      2. Remove the countersink head solid rivets.

      1. Refer to theStep.

    3. Remove the anchor nut.

      4. Install the new anchor nuts with the countersink head solid rivets on to the front support.

      1. Refer to SPM TASK 70-39-03-390-501.

      2. The head surfaces of the countersink head rivets must be below of the front support surface.

    4. SUBTASK 75-24-49-350-146 Replace the Clip Nuts (ITEM 2)

    1. Refer toFigure.

    2. Remove the clip nuts.

    3. Install the new clip nuts on to the front support.

    5. SUBTASK 75-24-49-350-062 Replace the Front Support (ITEM 5)

    1. Refer to Figure.

      NOTE

      If ITEM 5 is not available, do Step.

      2. Remove the universal head solid rivets.

      1. Refer to Step.

    3. Remove the front support.

      4. Install the front support with the universal head solid rivets on to the upper and lower air duct cooling assemblies.

      1. Refer to SPM TASK 70-39-03-390-501.

      5. Install the new anchor nuts on to the front support.

      1. Refer to Step.

    6. SUBTASK 75-24-49-350-147 Replace the Front Support (ITEM 6)

    1. Refer to Figure.

      2. Remove the universal head solid rivets.

      1. Refer to Step.

    3. Remove the front support.

      4. Install the front support with the universal head solid rivets on to the upper and lower air duct cooling assemblies.

      1. Refer to SPM TASK 70-39-03-390-501.

      5. Install the new clip nuts on to the front support.

      1. Refer to Step.

    7. SUBTASK 75-24-49-350-063 Replace the Rear Support (ITEM 7 or ITEM 8)

    1. Refer toFigure .

      2. Remove the universal head solid rivets.

      1. Refer to the Step.

    3. Remove the rear support.

      4. Install the rear support with the universal head solid rivets on to the upper and lower air duct cooling assemblies.

      1. Refer to SPM TASK 70-39-03-390-501.

    8. SUBTASK 75-24-49-210-051 Do the Post Repair Inspection

    1. Refer to Figure and Figure.

      2. Examine the quality of the riveting and the safety of the joints.

      1. Refer to SPM TASK 70-39-03-390-501.

      2. The head surfaces of the countersink head rivets must be below of the front support surface.

      3. Examine the formed heads of the universal and countersink head solid rivets.

      1. For dimensions refer to SPM TASK 70-39-03-390-501.

    9. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Updated Graphics (89VM513C)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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