TASK 72-41-21-200-017 HPC Inner To Outer Case Sealing Ring - Examine, Inspection-017

DMC:V2500-A0-72-41-2105-00A-300A-C|Issue No:002.00|Issue Date:2018-05-01

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 72-41-21-200-017 HPC Inner To Outer Case Sealing Ring - Examine, Inspection-017

Effectivity

FIG/ITEM

PART NO.

04-745

6A2506

04-745

6A5757

General

This TASK gives the procedure for the inspection of the inspection of the inner to outer case sealing ring.

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 the parts which must have a crack test is given in Step. Do the crack test before a 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 can 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 number 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 items refer to the SPM.

Methods 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 72-41-21-230-068 Examine the Inner to Outer Case Sealing Ring (04-745) for Cracks

    1. Clean the parts. Refer to TASK 72-41-21-100-000 (CLEANING-000).

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

        PART IDENT

        TASK/SUBTASK

        Inner to outer case sealing ring

        1. Cracked

        1. Reject.

    2. SUBTASK 72-41-21-220-164 Examine the Inner to Outer Case Sealing Ring (04-745) Faces at Locations 1 and 1116

    1. Refer to Figure.

      2. Galled.

        1. Up to 0.006 in. (0.152 mm) in depth.

        1. Repair, VRS9305 TASK 72-41-21-300-094 (REPAIR-064).

        2. More than in Step.

        1. Reject.

      3. Scratched.

        1. Up to 0.006 in. (0.152 mm) in depth.

        1. Repair, VRS9305 TASK 72-41-21-300-094 (REPAIR-064).

        2. More than in Step.

        1. Reject.

      4. Wear.

        1. If the width of the ring is between 0.1565 in. to 0.1585 in. (3.9751 mm to 4.0259 mm).

        1. Accept.

        2. If the width is less than in Step but more than 0.1445 in. (3.6703 mm).

        1. Repair, VRS9305 TASK 72-41-21-300-094 (REPAIR-064).

        3. If the width is less than in Step.

        1. Reject.

    3. SUBTASK 72-41-21-220-165 Examine the Inner to Outer Case Sealing Ring (04-745) Finish at Face Location 1117 (Pre SBE 70-0331)

    1. Refer to Figure.

      2. Scored

      1. Reject.

        2. Wear

          1. If the diameter is between 23.1547 in. to 23.1567 in. (588.13 mm to 588.18 mm)

          1. Accept.

          2. Less than in Step

          1. Reject.

      3. Peeled

      1. Reject.

    4. SUBTASK 72-41-21-220-499 Examine the Inner to Outer Case Sealing Ring (04-745) Finish at Face Location 1117 (SBE 70-0331)

    1. Refer to Figure.

    2. SBE 70-0331Information - Engine - HP Compressor - To announce the availability of a new stage 12 HPC rear inner to outer case sealing ring assembly.

      3. Nicked or Scratched

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

        1. Accept.

        2. More than in Step

        1. Repair, VRS6255 TASK 72-41-21-300-063 (REPAIR-063).

      4. Wear

        1. If the diameter is between 23.1547 to 23.1567 in. (588.13 to 588.18 mm)

        1. Accept

        2. Less than in Step.

        1. Reject.

    5. SUBTASK 72-41-21-220-205 Examine the Inner to Outer Case Sealing Ring (04-745) all Remaining Surfaces

      1. Nicked and Scratched.

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

        1. Accept.

        2. More than in Step

        1. Repair, VRS6255 TASK 72-41-21-300-063 (REPAIR-063).

    6. Figure: Inner to Outer Case Sealing Ring - Inspection Locations

    Inner to Outer Case Sealing Ring - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the inspection criteria for faces at locations 1 and 1116 and added references for VRS3905. (17VG084)