TASK 72-41-34-200-003-B00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Rear Housing, Inspection-003

DMC:V2500-A0-72-41-3412-00B-300A-C|Issue No:002.00|Issue Date:2016-08-01

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 72-41-34-200-003-B00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Rear Housing, Inspection-003

Effectivity

FIG/ITEM

PART NO.

01-760

6A7372

01-760

6A8808

General

This TASK gives the procedure for the inspection of the rear housing.

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.

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

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

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.

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 subsequent 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 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,

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 are contained in this TASK. For more data on these item 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 72-41-34-230-111 Examine the Rear Housing (01-760) for Cracks

    1. Clean the parts. Refer to TASK 72-41-34-100-000.

      2. Do the test for cracks on the part that is given below.

        PART IDENT

        TASK/OP

        Rear housing

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-34-220-281 Examine the Rear Housing Bearing Surface at Location 2 (Pre SBE 72-0564)

    1. Refer to Figure.

      2. Location 2.

        1. Scored.

          1. Not more than 0.004 in. (0.10 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

        2. Scratched.

          1. Not more than 0.002 in. (0.05 mm) in depth

          1. Accept

          2. More than in Step

          1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

        3. Wear.

          1. If the inner diameter of the bearing is between 2.4740 and 2.4760 in. (62.840 and 62.890 mm)

          1. Accept

          2. More than in Step

          1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

          3. Loose or delaminated liner

          1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

          4. Protruding/frayed fibres

          1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

    3. SUBTASK 72-41-34-220-574 Examine the Rear Housing Bearing Surface at Location 2 (SBE 72-0564)

    1. Refer to Figure.

      2. Location 2.

        1. Scored.

          1. Not more than 0.004 in. (0.10 mm) in depth

          1. Accept

          2. More than in Step

          1. Reject

        2. Scratched.

          1. Not more than 0.002 in. (0.05 mm) in depth

          1. Accept

          2. More than in Step

          1. Reject

        3. Wear.

          1. If the inner diameter of the bearing is between 2.8677 and 2.8697 in. (72.840 and 72.891 mm)

          1. Accept

          2. More than in Step

          1. Reject

          3. Loose or delaminated liner

          1. Reject

          4. Protruding/frayed fibres

          1. Reject

    4. SUBTASK 72-41-34-220-282 Examine the Rear Housing Locking Features at Location 4

    1. Refer to Figure.

      2. Location 4.

        1. Loose

        1. Repair VRS6685, TASK 72-41-34-300-063 (REPAIR-063)**

        2. Broken

        1. Repair VRS6685, TASK 72-41-34-300-063 (REPAIR-063)**

    5. SUBTASK 72-41-34-220-283 Examine the Rear Housing Bolt Holes at Location 6

    1. Refer to Figure.

      2. Elongated.

      1. Reject

      3. Wear.

        1. If the diameter is between 0.347 and 0.361 in. (8.80 and 9.16 mm)

        1. Accept

        2. More than in Step

        1. Reject

    6. SUBTASK 72-41-34-220-284 Examine the Rear Housing Dowel Hole at Location 8

    1. Refer to Figure.

      2. Location 8.

        1. If the dowel hole diameter is between 0.198 and 0.199 in. (5.03 and 5.06 mm)

        1. Accept

        2. More than in Step

        1. Reject

    7. SUBTASK 72-41-34-220-292 Examine the Rear Housing Dowel Hole at Location 13

      1. Refer to Figure.

        1. Dimension A.

          1. If the dowel hole dimension A is between 0.198 and 0.199 in. (5.03 and 5.06 mm)

          1. Accept

          2. More than in Step

          1. Reject

      2. Dowel hole - length.

        1. If the dowel hole length is between 0.472 and 0.496 in. (12.00 and 12.60 mm)

        1. Accept

        2. More than in Step

        1. Reject

    8. SUBTASK 72-41-34-220-287 Examine the Rear Housing Bolt Holes at Location 12

    1. Refer to Figure.

      2. Elongated.

      1. Reject

      3. Wear.

        1. If the diameter is between 0.284 and 0.298 in. (7.20 and 7.56 mm)

        1. Accept

        2. More than in Step

        1. Reject

    9. SUBTASK 72-41-34-220-289 Examine the Rear Housing Inner and Outer Races at Locations 10 and 11 (SBE 72-0564)

    1. Refer to Figure.

      2. Inner bearing race.

        1. Inner bearing race rotational movement should be smooth with no radial movement

        1. Accept

        2. Rotational binding

        1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

        3. Radial movement

        1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

      3. Outer bearing race.

        1. Outer bearing race should have no rotational or radial movement

        1. Accept

        2. Rotational movement

        1. Repair VRS6240, TASK 72-41-34-300-016 (REPAIR-016)

        3. Radial movement

        1. Repair, VRS6240 TASK 72-41-34-300-016 (REPAIR-016).

    10. SUBTASK 72-41-34-220-290 Examine the Rear Housing all Remaining Surfaces

      1. Nicked, dented and scratched.

        1. Not more than 0.002 in. (0.05 mm) in depth

        1. Accept

        2. More than in Step

        1. Reject

    11. Figure: Rear Housing - Inspection Locations

    Rear Housing - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to remove redundant task information. (16VC164)