TASK 72-42-50-200-001-C00 HPC Rear Static Seal - Examine, Inspection-001

DMC:V2500-A0-72-42-5001-00C-300A-C|Issue No:007.00|Issue Date:2019-08-01

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 72-42-50-200-001-C00 HPC Rear Static Seal - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-100

6A4447

01-100

6B1412

General

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 SPM TASK 70-20-01-200-501.

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 International Aero Engines AG.

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 appproved 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. Limits for cracks are given in the SUBTASK for each part.

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.

Definition of Damage, SPM TASK 70-02-02-350-501.

Inspection of Parts, SPM TASK 70-22-00-220-501

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 72-42-50-230-065 Examine the Static Seal for Cracks

    1. Clean the part. Refer to TASK 72-42-50-100-000.

      2. Do the test for cracks on the part that follows.

        PART IDENT

        TASK/SUBTASK

        Static seal

        SPM TASK 70-23-02-230-501

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-42-50-220-072 Examine the Abradable Linings at Locations 2, 3 and 4

    1. Refer to Figure and Figure.

      2. Rubbed

      1. Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

      3. Measure diameter A (Location 1).

        1. Diameter is between 6.919 in. and 6.924 in. (175.75 mm and 175.87 mm)

        1. Accept.

        2. Limits more than Step.

        1. Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

      4. Measure diameter B (Location 2).

        1. Diameter is between 7.131 in. and 7.136 in. (181.13 mm and 181.27 mm)

        1. Accept.

        2. Limits more than Step.

        1. Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

      5. Measure diameter C (Location 3).

        1. Diameter is between 7.344 in. and 7.349 in. (186.53 mm and 186.67 mm)

        1. Accept.

        2. Limits more than Step.

        1. Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

      6. Measure diameter D (Location 4).

        1. Diameter is between 7.562 in. and 7.556 in. (191.93 mm and 192.07 mm)

        1. Accept.

        2. Limits more than Step

        1. Repair, VRS6203 TASK 72-42-50-300-002 (REPAIR-002).

    3. SUBTASK 72-42-50-220-073 Examine the Two Balance Tubes at Location 7

    1. Refer to Figure and Figure.

      2. Scored.

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

        1. Accept.

        2. Limits more than Step

        1. Repair, VRS6639 TASK 72-42-50-300-007.

      3. Missing or loose rivets

      1. Repair, VRS6639 TASK 72-42-50-300-007

    4. SUBTASK 72-42-50-220-074 Examine the Inner Seal Carrier at Location 6

    1. Refer to Figure and Figure.

      2. Distorted.

      1. Reject.

      3. Loose or missing rivets.

      1. Reject.

    5. SUBTASK 72-42-50-220-075 Examine the Static Seal Cone

    1. Refer to Figure and Figure.

      2. Galled (Locations 5E and 5F).

        1. To a depth not more than 0.002 in. (0.05 mm).

        1. Accept.

        2. Limits more than Step.

        1. For PN 6A4447: Repair, VRS6116 TASK 72-42-50-300-004 (REPAIR-004).

      3. For PN 6B1412: Reject.

      3. Galled (Location 5D).

      1. Reject.

      4. Jacking holes (Location 8).

        1. Thread damage.

        1. Reject.

      5. Measure diameter G (Location 5D).

        1. For PN 6A4447: Diameter is between 16.9050 in. and 16.9074 in. (429.387 mm and 429.449 mm).

          For PN 6B1412: Diameter is between 16.9039 in. and 16.9085 in. (429.358 mm and 429.478 mm).

        1. Accept.

        2. Limits less than Step.

        1. For PN 6A4447: Repair, VRS6231 TASK 72-42-50-300-005 (REPAIR-005).

        2. For PN 6B1412: Repair, VRS9493 TASK 72-42-50-300-009 (REPAIR-009).

        3. Limits more than Step.

        1. For PN 6A4447: Repair, VRS6231 TASK 72-42-50-300-005 (REPAIR-005).

        2. For PN 6B1412: Reject.

    6. Figure: Examine the HP Compressor Static Seal, PN 6A4447

    Examine the HP Compressor Static Seal, PN 6A4447

    Figure: Examine the HP Compressor Static Seal, PN 6B1412

    Examine the HP Compressor Static Seal, PN 6B1412

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update repair references and figures. (18VG395)