TASK 72-32-23-200-002 HPC Front Shaft Assembly - Examine, Inspection-002

DMC:V2500-A0-72-32-2302-00A-300A-C|Issue No:003.00|Issue Date:2020-11-01

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 72-32-23-200-002 HPC Front Shaft Assembly - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-745

6A3899

01-745

6A4147

01-745

6A2940

01-745

6A2914

01-745

6A3888

01-745

6A8083

01-745

6A8094

General

This TASK gives the procedure to examine No. 3 Bearing Rotor Center Front Stub Shaft. You must make sure that this TASK is applicable to the part that is to be examined. Refer to TASK 72-32-23-200-000.

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

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

All the parts must be cleaned before any part is examined.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.

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

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 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 SPM.

References

Refer to SPM for data on these items.

Definitions of damage SPM TASK 70-02-02-350-501.

Record and control of the lives of parts, SPM TASK 70-05-00-220-501.

Inspection of parts, SPM TASK 70-20-01-200-501.

Some data on these items is contained in this TASK. For more data on these items refer to 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 72-32-23-230-052 Examine the No. 3 Bearing Rotor Center Front Stub Shaft (01-745) for Cracks

    1. Clean the parts. Refer to TASK 72-32-23-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts given below.

        PART IDENT

        TASK/SUBTASK

        No. 3 Bearing Rotor Center Front Stub Shaft

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-32-23-220-056 Examine the No. 3 Bearing Rotor Center Front Stub Shaft (01-745) for Damage

      1. Nicks, dents and high metal.

      1. Repair, VRS6124 TASK 72-32-23-300-001 (REPAIR-001).

    3. SUBTASK 72-32-23-220-057 Examine the Front Stub Shaft (01-745) Rear Location Face at Location 1

    1. Refer to Figure.

      2. Galled, scored or scratched.

      1. Reject.

    4. SUBTASK 72-32-23-220-058 Examine the Front Stub Shaft (01-745) Bolt Holes at Location 2

    1. Refer to Figure.

      2. Burred or scored.

      1. Reject.

    5. SUBTASK 72-32-23-220-059 Examine the Front Stub Shaft (01-745) Curvic Teeth at Location 3

    1. Refer to Figure.

      2. Galled or damaged.

        1. Within the limits of VRS6125.

        1. Repair, VRS6125 TASK 72-32-23-300-002 (REPAIR-002).

        2. More than in Step.

        1. Repair, VRS6365 TASK 72-32-23-300-011 (REPAIR-011)**

    6. SUBTASK 72-32-23-220-060 Examine the Front Stub Shaft (01-745) Location Pegs at Location 4

    1. Refer to Figure.

      2. Scratches in depth less than 0.002 in. (0.05 mm).

      1. Accept.

      3. Damage or scratches in excess of Step.

      1. Repair, VRS6124 TASK 72-32-23-300-001 (REPAIR-001).

      4. Loose, bent or part/all of a peg missing.

      1. Repair, VRS6267 TASK 72-32-23-300-006 (REPAIR-006).

    7. SUBTASK 72-32-23-220-061 Examine the Front Stub Shaft (01-745) Bushes at Location 5

    1. Refer to Figure.

      2. Damaged, loose, or bushes that are not there.

      1. Repair, VRS6488 TASK 72-32-23-300-013 (REPAIR-013).

    8. SUBTASK 72-32-23-220-062 Examine the Front Stub Shaft (01-745) Threads at Locations 6A and 6B

    1. Refer to Figure.

      2. Damaged at Location 6A.

        1. Visually examine the shaft to make sure that the removal of incomplete thread has not been done before

        1. Look for the repair identification mark. If the mark with "VRS1991A" is found, 12 A. (2) must not be applied to the shaft because incomplete thread had been removed already. Damage must be inspected in accordance with 12 A. (3).

          2. Incomplete thread, which is within an arc of 90 degrees from beginning of the thread.

            1. Any amount.

            1. Repair, VRS1991 TASK 72-32-23-300-015 (REPAIR-015).

          3. Remaining threads except in Step.

            1. Up to 0.019 in. (0.50 mm) in depth and total length of the damaged thread including previous repair to VRS1991 is less than 3.05 in. (77.7 mm).

            1. Repair, VRS1991 TASK 72-32-23-300-015 (REPAIR-015).

            2. More than in Step.

            1. Reject.

      3. Damaged at Location 6B.

        1. Up to 0.019 in. (0.50 mm) in depth and total length of the damaged thread including previous repair to VRS1991 is less than 3.24 in (82.5 mm).

        1. Repair, VRS1991 TASK 72-32-23-300-015 (REPAIR-015).

        2. More than in Step.

        1. Reject.

    9. SUBTASK 72-32-23-220-063 Examine the Front Stub Shaft (01-745) Hard Coatings at Locations 7A and 7B

    1. Refer to Figure.

      2. Dimensionally examine the average diameter at Location 7A (mating diameter 0202).

        1. If the average diameter is between 5.2410 in. and 5.2414 in. (133.122 mm and 133.134 mm).

        1. Accept.

        2. Write down the dimension of the diameter.

        2. If the average diameter is between 5.2414 in. and 5.2419 in. (133.134 mm and 133.145 mm).

        1. Accept the part for select fit only.

          NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of reference No. 0202. Refer to TASK 72-32-20-440-001-A00 (Assembly-001) or TASK 72-32-20-440-001-B00 (Assembly-001).

        2. Write down the dimension of the diameter.

        3. Other than Step or Step.

        1. Contact IAE Technical Services.

      3. Dimensionally examine the average diameter at Location 7B (mating diameter 0207).

        1. If the average diameter is between 5.5553 in. and 5.5558 in. (141.105 m and 141.117 mm).

        1. Accept.

        2. Write down the dimension of the diameter.

        2. If the average diameter is between 5.5558 in. and 5.5561 in. (141.117 mm and 141.125 mm).

        1. Accept the part for select fit only.

          NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of reference No. 0207. Refer to TASK 72-32-20-440-001-A00 (Assembly-001) or TASK 72-32-20-440-001-B00 (Assembly-001).

        2. Write down the dimension of the diameter.

        3. Other than Step or Step.

        1. Contact IAE Technical Services.

    10. SUBTASK 72-32-23-220-064 Examine the Front Stub Shaft (01-745) Splines at Location 8

    1. Refer to Figure.

      2. Cracked.

      1. Reject.

      3. Nicked, dented, galled, chipped, scored or scratched.

      1. Repair, VRS1990 TASK 72-32-23-300-014 (REPAIR-014).

    11. SUBTASK 72-32-23-220-065 Examine the Front Stub Shaft (01-745) Thrust Face at Location 9

    1. Refer to Figure.

      2. Scored or scratched.

        1. Not more than 0.0020 in. (0.051 mm) in depth, without high metal.

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6124 TASK 72-32-23-300-001 (REPAIR-001).

      3. Nicked, dented or galled.

      1. Repair, VRS6124 TASK 72-32-23-300-001 (REPAIR-001).

    12. SUBTASK 72-32-23-220-066 Examine the Front Stub Shaft (01-745) Rear Location Diameter at Location 10

    1. Refer to Figure.

      2. Galled or scored.

      1. Repair, VRS6127 TASK 72-32-23-300-004 (REPAIR-004).

      3. Dimensionally examine the average diameter.

        1. If the average diameter is between 7.5287 in. and 7.5298 in. (191.2280 mm and 191.2570 mm).

        1. Accept.

        2. Write down the dimension of the diameter.

        2. If the average diameter is between 7.5298 in. and 7.5306 in. (191.2570 mm and 191.2772 mm).

        1. Accept the part for select fit only.

          NOTE

          This part can be used only if the mating part has a diameter that will result in a fit specified in the assembly task. Refer to TASK 72-32-23-440-001-A00 or TASK 72-32-23-440-001-B00.

        2. Write down the dimension of the diameter.

        3. If the diameter is less than 7.5287 in. (191.2280 mm).

        1. Repair, VRS6127 TASK 72-32-23-300-004 (REPAIR-004).

        4. Other than Step, Step or Step.

        1. Reject.

    13. Figure: No. 3 Bearing Rotor Center, Front Stub Shaft - Inspection Locations

    No. 3 Bearing Rotor Center, Front Stub Shaft - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Correct task reference (CAS-85277-B3Z4S0)