TASK 72-41-13-200-002 HPC Rear Shaft Heatshield - Examine, Inspection-002

DMC:V2500-A0-72-41-1302-00A-300A-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 72-41-13-200-002 HPC Rear Shaft Heatshield - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-875

6A1494

01-875

6A7400

General

This TASK gives the procedure for the inspection of the HP compressor shaft heatshield. For the HP compressor shaft parts, refer to TASK 72-41-13-200-000.

Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to TASK 72-41-13-100-000.

All the parts must be visually examined for damage, corrosion and wear. Defects that are not identified in the procedure must be referred to International Aero Engines AG.

The procedure for those parts which must have a crack test is given in Step Do the test before the part is visually examined. Limits for cracks are given in the SUBTASK for each part.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in Repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All the parts must be examined to make sure that all the repairs have been completed satisfactorily.

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

References

Refer to the SPM for data on these items.

Definition of Damage, SPM TASK 70-02-02-350-501

Inspection of Parts, SPM TASK 70-20-01-200-501

Some data on these items are contained in this TASK. For more data on these items refer to the SPM.

Method of Testing for Crack Indications

Chemical Processes

Surface Protection

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-13-230-051 Examine the Heatshield for Cracks

    1. Clean the part. Refer to TASK 72-41-13-100-000.

      2. Do the test for cracks on the parts that follow.

        PART IDENT

        TASK/SUBTASK

        Heatshield

        SPM TASK

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-13-220-051 Examine the Heatshield Face at Location 1

    1. Refer to Figure.

      2. Galled and scored.

        1. Up to 0.002 in. (0.05 mm) in depth

        1. Accept

        2. More than in Step

        1. Repair, VRS6378 TASK 72-41-13-300-003

      3. Measure the diameter A (location 1).

        1. Diameter is between 4.6478 and 4.6492 in. (118.054 and 118.089 mm)

        1. Accept

        2. Diameter less than 4.6478 in. (118.054 mm)

        1. Repair, VRS6379 TASK 72-41-13-300-004

    3. SUBTASK 72-41-13-220-052 Examine the Heatshield Face at Location 2

    1. Refer to Figure.

      2. Galled or nicked.

        1. Up to 0.002 in. (0.05 mm)

        1. Accept

        2. More than in Step

        1. Repair, VRS6378 TASK 72-41-13-300-003

    4. SUBTASK 72-41-13-220-053 Examine the Heatshield Face at Location 3

    1. Refer to Figure.

      2. Galled, scored or nicked.

        1. Up to 0.002 in. (0.05 mm)

        1. Accept

        2. More than in Step

        1. Repair, VRS6378 TASK 72-41-13-300-003

    5. SUBTASK 72-41-13-220-054 Examine the Heatshield Metal Spray at Location 4

    1. Refer to Figure.

      2. Galled or scored.

        1. Up to 0.002 in. (0.05 mm)

        1. Accept

        2. More than in Step

        1. Repair, VRS6380 TASK 72-41-13-300-005

      3. Metal spray that is not there

      1. Repair, VRS6380 TASK 72-41-13-300-005

      4. Do an 8 eight point check on the diameter B (location 4).

        1. Largest diameter in excess of 0.015 in. (0.38 mm) more than the smallest diameter

        1. Repair, VRS6380 TASK 72-41-13-300-005

        2. The mean diameter is between 4.417 and 4.421 in. (112.20 and 112.30 mm)

        1. Accept

        3. Not within limits of Step

        1. Repair, VRS6380 TASK 72-41-13-300-005

    6. SUBTASK 72-41-13-220-055 Examine the Heatshield Groove at Location 5

    1. Refer to Figure.

      2. Scored, nicked or scratched.

        1. Up to 0.002 in. (0.05 mm) in depth

        1. Accept

        2. More than in Step

        1. Repair, VRS6378 TASK 72-41-13-300-003

    7. SUBTASK 72-41-13-220-056 Examine the Heatshield all Remaining Surfaces

      1. Scored, nicked or scratched.

        1. Up to 0.002 in. (0.05 mm) in depth

        1. Accept

        2. More than in Step

        1. Repair, VRS6378 TASK 72-41-13-300-003

      2. Dented.

        1. Areas less than 0.25 sq.in. (161.3 sq.mm) if the depth is less than 0.05 in. (1.27 mm)

        1. Accept

        2. More than in Step

        1. Reject

    8. Figure: HP compressor shaft heatshield - inspection locations

    HP compressor shaft heatshield - inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE