TASK 72-41-34-200-028-B00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Front Bearing Housing, Inspection-028

DMC:V2500-A5-72-41-3412-01A-300A-C|Issue No:002.00|Issue Date:2020-02-01

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

V2500-A5

Common Information

TASK 72-41-34-200-028-B00 HPC Vane Actuating Crankshaft Bearing Housings - Examine The Front Bearing Housing, Inspection-028

Effectivity

FIG/ITEM

PART NO.

01-631

6A7370

01-638

AS20643

01-634

6A7549

01-636

RRN362

General

This TASK gives the procedure for the inspection of the SBE 72-0366 front bearing housing (01-631), spherical bearing (01-634), straight headless pin (01-638) and outer retaining ring (01-636).

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.

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 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 72-41-34-230-115 Examine the Components 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 bearing housing (01-631)

        Front spherical bearing (01-634)

        Outer retaining ring (01-636)

        Straight headless pin (01-638)

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-34-220-301 Examine the Front Housing Spherical Bearing

    1. Refer to Figure.

      2. 2 Bearing surface.

        1. Scored.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

        2. Scratched.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

      3. Diameter A.

        1. Wear.

          1. If the inner diameter of the bearing is between 2.8347 and 2.8354 in. (72.000 and 72.018 mm).

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

      4. Outer race surface.

        1. Scored.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

        2. Scratched.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

        3. Dented.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

      5. Diameter B.

        1. Wear.

          1. If the outer diameter of the bearing is between 3.550 and 3.549 in. (90.170 and 90.152 mm).

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

      6. Bearing race.

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

        1. Accept.

        2. Rotational binding.

        1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

        3. Radial movement.

        1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

      7. Slot D.

        1. Scored.

          1. Not more than 0.002 in. (0.05 mm) in depth with no raised metal.

          1. Accept.

          2. More than in Step.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

          3. Burred.

          1. Repair or replace by Repair, VRS6239 TASK 72-41-34-300-015 (REPAIR-015).

    3. SUBTASK 72-41-34-220-302 Examine the Front Bearing Housing Diameter E

    1. Refer to Figure.

      2. Diameter E.

        1. If the diameter is between 3.550 and 3.551 in. (90.170 and 90.1958 mm)

        1. Accept

        2. More than in step (1)

        1. Reject

    4. SUBTASK 72-41-34-220-303 Examine the Front Bearing Housing Groove 14

    1. Refer to Figure.

      2. Diameter E.

        1. If the groove is between 0.120 in. and 0.125 in. (3.048 mm and 3.178 mm)

        1. Accept

        2. More than in step (1)

        1. Reject

    5. SUBTASK 72-41-34-220-304 Examine the Front Bearing Housing (01-631) Bolt Holes at Location 5

    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)

        1. Reject

    6. SUBTASK 72-41-34-220-305 Examine the Front Bearing Housing (01-631) Dowel Hole at Location 7

    1. Refer to Figure.

      2. Location 7.

        1. Elongated

        1. Reject

        2. Wear.

          3. If the diameter is between 0.237 and 0.239 in. (6.03 and 6.06 mm)

          1. Accept

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

          1. Reject

    7. SUBTASK 72-41-34-220-306 Examine the Front Bearing Housing (01-631) Dowel Hole at Location 13

    1. Refer to Figure.

      2. Elongated

      1. Reject

        2. 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)

          1. Reject

        3. Dowel hole - length.

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

          1. Accept

          2. More than in step (1)

          1. Reject

    8. SUBTASK 72-41-34-220-307 Examine the Front Bearing Housing (01-631) Rigging Pin Hole at Location 9

    1. Refer to Figure.

      2. Elongated

      1. Reject

    9. SUBTASK 72-41-34-220-309 Examine the Front Bearing Housing (01-631) 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)

        1. Reject

    10. SUBTASK 72-41-34-220-310 Examine the Outer Retaining Ring and Straight Headless Pin (01-636 and 01-638)

      1. Outer Retaining Ring and straight headless pin.

        1. Bent or burred

        1. Reject

        2. Scored not more than 0.002 in. (0.05 mm) in depth with no raised metal

        1. Accept

        3. More than in (2)

        1. Reject

    11. Figure: SBE 72-0366: Front Bearing Housing - Inspection Locations

    SBE 72-0366: Front Bearing Housing - Inspection Locations

    Figure: SBE 72-0366: Front Bearing Housing Spherical Bearing - Inspection Locations

    SBE 72-0366: Front Bearing Housing Spherical Bearing - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update repair reference. (19VC366)