TASK 72-41-34-200-003-A00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Front And Rear Housings, Inspection-003

DMC:V2500-A0-72-41-3412-00A-300A-C|Issue No:004.00|Issue Date:2016-11-01

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 72-41-34-200-003-A00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Front And Rear Housings, Inspection-003

Effectivity

FIG/ITEM PART NO.

01-730

6A3517

01-760

6A3519

General

This TASK gives the procedure for the inspection of the front and rear housings.

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC.

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 those parts which must have a crack test is given in Step. Do the crack 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 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 is 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 72-41-34-230-052 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 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

        Front and rear housings

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-34-220-061 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) Bearing Surfaces at Locations 1 and 2

    1. Refer to Figure and Figure.

      2. Location 1.

        1. Scored.

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

          1. Accept

          2. More than in step (1)(a)

          1. Repair VRS6239, TASK 72-41-34-300-015

        2. Scratched.

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

          1. Accept

          2. More than in step (2)(a)

          1. Repair VRS6239, TASK 72-41-34-300-015

        3. Worn.

          1. If the inner diameter of the bearing is between 2.4990 to 2.4997 in. (63.475 to 63.493 mm)

          1. Accept

          2. More than in step (3)(a)

          1. Repair VRS6239, TASK 72-41-34-300-015

      3. Location 2.

        1. Scored.

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

          1. Accept

          2. More than in step (1)(a)

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

        2. Scratched.

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

          1. Accept

          2. More than in step (2)(a)

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

        3. Worn.

          1. If the inner diameter of the bearing is between 2.4740 to 2.4760 in. (62.839 to 62.890 mm)

          1. Accept

          2. More than in step (3)(a)

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

    3. SUBTASK 72-41-34-220-062 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) Locking Features at Locations 3 and 4

    1. Refer to Figure and Figure.

      2. Location 3.

        1. Loose

        1. Repair VRS6239, TASK 72-41-34-300-015

        2. Broken

        1. Repair VRS6239, TASK 72-41-34-300-015

      3. Location 4.

        1. Loose

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

        2. Broken

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

    4. SUBTASK 72-41-34-220-063 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) Bolt Holes at Locations 5 and 6

    1. Refer to Figure and Figure.

      2. Elongated

      1. Reject

      3. Worn

        1. If the diameter is between 0.340 to 0.360 in. (8.636 to 9.144 mm)

        1. Accept

        2. More than in step C.(1)

        1. Reject

    5. SUBTASK 72-41-34-220-064 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) Dowel Holes at Locations 7 and 8

    1. Refer to Figure and Figure.

      2. Location 7.

        1. Elongated

        1. Reject

        2. Worn

          1. If the diameter is between 0.237 to 0.239 in. (6.02 to 6.07 mm)

          1. Accept

          2. More than in step (2)(a)

          1. Reject

      3. Location 8.

        1. If the dowel hole is between 0.198 to 0.199 in. (5.03 to 5.05 mm) in width and 0.252 to 0.268 in. (6.40 to 6.81 mm) in length

        1. Accept

        2. More than in step C.(1)

        1. Reject

      4. Location 13.

        1. Elongated

        1. Reject

        2. Worn.

          1. If the diameter is between 0.198 to 0.199 in. (5.03 to 5.05 mm)

          1. Accept

          2. More than in step (2)(a)

          1. Reject

    6. SUBTASK 72-41-34-220-066 Examine the Front Housing (72-41-34, 01-730) Rigging Pin Hole at Location 9

    1. Refer to Figure.

      2. Elongated

      1. Reject

    7. SUBTASK 72-41-34-220-067 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) Surface Protection

      1. Chipped

      1. Repair VRS6356, TASK 72-41-34-300-033

      2. Surface protection that is not there

      1. Repair VRS6356, TASK 72-41-34-300-033

    8. SUBTASK 72-41-34-220-169 Examine the Rear Housing (72-41-34, 01-760) Bolt Holes at Location 12

    1. Refer to Figure.

      2. Screw thread inserts.

        1. Broken

        1. Repair VRS6294, TASK 72-41-34-300-034

        2. Loose

        1. Repair VRS6294, TASK 72-41-34-300-034

        3. Worn

        1. Repair VRS6294, TASK 72-41-34-300-034

        4. Crossed thread

        1. Repair VRS6294, TASK 72-41-34-300-034

        5. Stripped thread

        1. Repair VRS6294, TASK 72-41-34-300-034

    9. SUBTASK 72-41-34-220-170 Examine the Front Housing (72-41-34, 01-730) Inner and Outer Races at Locations 10 and 11

    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 VRS6239, TASK 72-41-34-300-015

        3. Radial movement

        1. Repair VRS6239, TASK 72-41-34-300-015

      3. Outer bearing race.

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

        1. Accept

        2. Rotational movement

        1. Repair VRS6239, TASK 72-41-34-300-015

        3. Radial movement

        1. Repair VRS6239, TASK 72-41-34-300-015

    10. SUBTASK 72-41-34-220-171 Examine the Rear Housing (72-41-34, 01-760) Inner and Outer Races at Locations 10 and 11

    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

        3. Radial movement

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

      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

        3. Radial movement

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

    11. SUBTASK 72-41-34-220-172 Examine the Front and Rear Housings (72-41-34, 01-730) and (72-41-34, 01-760) all Remaining Surfaces

      1. Nicked/Dented/Scratched.

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

        1. Accept

        2. More than in step A.(1)

          1. Fig/item HPC Variable Stator Vane Actuation System (72-41-34, 01-730)

          1. Repair, VRS6291 TASK 72-41-34-300-002 (REPAIR-001).

          2. Fig/item HPC Variable Stator Vane Actuation System (72-41-34, 01-760)

          1. Repair VRS6292, TASK 72-41-34-300-036

    12. Figure: Front And Rear Housings - Inspection Locations

    Front And Rear Housings - Inspection Locations

    Figure: Front And Rear Housings - Inspection Locations

    Front And Rear Housings - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Updated to provide correct link to VRS6291 (Editorial)