TASK 72-41-21-200-007-B00 HPC Stage 8 Case - Examine, Inspection-007

DMC:V2500-A0-72-41-2108-00B-300A-C|Issue No:003.00|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

All

Common Information

TASK 72-41-21-200-007-B00 HPC Stage 8 Case - Examine, Inspection-007

Effectivity

FIG/ITEM

PART NO.

03-650

6A4324

General

This TASK gives the procedure for the inspection of the stage 8 case.

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 variant 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 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 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/SUBTASK 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,

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 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 72-41-21-230-152 Examine the Stage 8 Case for Cracks

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

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

        PART IDENT

        TASK/SUBTASK

        Stage 8 Case

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-41-21-220-378 Examine the Stage 8 Case Front and Rear Flanges at Face Locations 1, 2, 1103 and 1178

    1. Refer to Figure.

      2. Galled.

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

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

      3. Scored.

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

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

      4. Bores at Location 1103 and 1178.

        1. If the diameter is between 21.344 in. and 21.348 in. (542.13 mm and 542.25 mm).

        1. Accept.

        2. More than in Step.

        1. Reject.

    3. SUBTASK 72-41-21-220-379 Examine the Stage 8 Case Bolt Holes at Locations 4 and 5

    1. Refer to Figure.

      2. Burred edges.

      1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

      3. Scored.

      1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

    4. SUBTASK 72-41-21-220-380 Examine the Stage 8 Case Holes at Locations 6, 7, 1190 and 1151

    1. Refer to Figure.

      2. Location dowel hole 1190.

        1. Burred edges.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

        2. If the diameter is between 0.315 in. to 0.316 in. (8.000 mm to 8.022 mm).

        1. Accept.

        3. If the diameter is more than in Step.

        1. Reject.

      3. Stop Location hole 1151.

        1. Burred edges.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

        2. If the diameter is between 0.2504 in. to 0.2535 in. (6.360 mm to 6.440 mm).

        1. Accept.

        3. If the diameter is more than in step Step.

        1. Reject.

      4. Dowel holes 6 and 7.

        1. Burred edges.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

        2. If the diameter is between 0.220 in. to 0.232 in. (5.60 mm to 5.90 mm).

        1. Accept.

        3. More than in step Step.

        1. Reject.

    5. SUBTASK 72-41-21-220-381 Examine the Stage 8 Case Shank Nuts at Locations 8 and 9

    1. Refer to Figure.

      2. Loose.

      1. Repair, VRS6218 TASK 72-41-21-300-036 (REPAIR-036).

      3. Damaged.

      1. Repair, VRS6218 TASK 72-41-21-300-036 (REPAIR-036).

      4. Run-down torque.

        1. If the run-down torque is between 36 to 45 lbfin. (4.00 Nm to 5.00 Nm).

        1. Accept.

        2. If the run-down torque is more or less than in Step.

        1. Repair, VRS6218 TASK 72-41-21-300-036 (REPAIR-036).

    6. SUBTASK 72-41-21-220-382 Examine the Stage 8 Case Location Dowel at Locations 1192 and 1193

    1. Refer to Figure.

      2. Loose.

      1. Reject.

        2. Outer diameter.

          1. If the outer diameter is between 0.303 in. and 0.305 in. (7.70 mm and 7.75 mm).

          1. Accept.

          2. Less than in Step.

          1. Reject.

    7. SUBTASK 72-41-21-220-383 Examine the Stage 8 Case Borescope Access Port for Damage

    1. Refer to Figure.

      2. Scored.

      1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

      3. Loose rivets.

      1. Repair, VRS6249 TASK 72-41-21-300-038 (REPAIR-038).

      4. Burred edges.

      1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

    8. SUBTASK 72-41-21-220-384 Examine the Stage 8 Case Surface Protection

      1. Damaged.

      1. Accept.

    9. SUBTASK 72-41-21-220-385 Examine the Stage 8 Case Remaining Surfaces

      1. Nicked, galled or scored.

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

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6095 TASK 72-41-21-300-009 (REPAIR-009).

    10. Figure: Stage 8 Case - Inspection Locations

    Stage 8 Case - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised inspection criteria. (18VG258)