TASK 72-41-21-200-004-B00 HPC Stage 7 Case - Examine, Inspection-004

DMC:V2500-A0-72-41-2107-00B-300A-C|Issue No:004.00|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 72-41-21-200-004-B00 HPC Stage 7 Case - Examine, Inspection-004

Effectivity

FIG/ITEM

PART NO.

03-500

6A4569

03-500

6A7019

General

This TASK gives the procedure for the inspection of the stage 7 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 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 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 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 70-20-01-200-501.

Some data on these items are contained in this TASK. For more data on these items refer to 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 72-41-21-230-150 Examine the Stage 7 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 7 Case

        TASK

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-41-21-220-365 Examine the Stage 7 Case Front and Rear Flanges at Face Locations 1, 2, 1101 and 1102

    1. Refer to Figure.

      2. Galled.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

      3. Scored.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

      4. Location 1101.

        1. Pre SB72-0296.

          1. If the diameter is between 22.539 in. and 22.543 in. (572.50 mm and 572.58 mm).

          1. Accept.

          2. If the diameter is more than Step.

          1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

          3. If the diameter is less than Step.

          1. Reject.

        2. SB72-0296.

          1. If the diameter is between 22.539 in. and 22.543 in. (572.48 mm and 572.60 mm).

          1. Accept.

          2. If the diameter is more than Step.

          1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

          3. If the diameter is less than Step.

          1. Reject.

      5. Corrosion pitting (Face at location 1 and 2).

      1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

    3. SUBTASK 72-41-21-220-366 Examine the Stage 7 Case Bolt Holes at Locations 3 and 4

    1. Refer to Figure.

      2. Burred edges.

      1. Repair, VRS6093 TASK 72-41-21-300-005(REPAIR-005).

      3. Scored.

      1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

    4. SUBTASK 72-41-21-220-367 Examine the Stage 7 Case Holes at Locations 5, 6, 1147 and 1187

    1. Refer to Figure.

      2. Stop location holes 1147.

        1. Burred edges.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

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

        1. Accept.

        3. If the diameter is other than Step.

        1. Reject.

      3. Dowel holes 5 and 6.

        1. Burred edges.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

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

        1. Accept.

        3. Other than Step.

        1. Reject.

      4. Location dowel hole 1187.

        1. Burred edges.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

        2. If the diameter is between 0.315 in. and 0.316 in. (8.00 mm and 8.022 mm).

        1. Accept.

        3. If the diameter is other than Step.

        1. Reject.

    5. SUBTASK 72-41-21-220-368 Examine the Stage 7 Case Spacers at Locations 7 (1149) and 8 (1144)

    1. Refer to Figure.

      2. Loose.

      1. Repair, VRS6266 TASK 72-41-21-300-034 (REPAIR-034).

      3. Missing.

      1. Repair, VRS6266 TASK 72-41-21-300-034 (REPAIR-034).

      4. Wear.

        1. Location 1144 and 1149.

          1. Pre SB72-0296.

            1. If the spacer diameter is between 0.3161 in. and 0.3164 in. (8.028 mm and 8.037 mm).

            1. Accept.

          2. Other than Step.

          1. Repair, VRS6266 TASK 72-41-21-300-034 (REPAIR-034).

    6. SUBTASK 72-41-21-220-369 Examine the Stage 7 Case Location Dowel at Location 1189

    1. Refer to Figure.

      2. Loose.

      1. Repair, VRS6549 TASK 72-41-21-300-027 (REPAIR-027).

      3. 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 Step.

        1. Repair, VRS6549 TASK 72-41-21-300-027 (REPAIR-027).

    7. SUBTASK 72-41-21-220-370 Examine the Stage 7 Case Surface Protection

      1. Damaged.

      1. Repair, VRS6163 TASK 72-41-21-300-006 (REPAIR-006).

    8. SUBTASK 72-41-21-220-371 Examine the Stage 7 Case Remaining Surfaces

      1. Nicked, scored or galled.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

    9. SUBTASK 72-41-21-220-372 Examine the Stage 7 Case Bores at Locations 1179 and 1180

    1. Refer to Figure.

      2. Nicks.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      3. Scored.

        1. Up to 0.002 in. (0.005 mm) in depth.

        1. Accept.

        2. More than Step.

        1. Reject.

      4. Location 1179 and 1180.

        1. Pre SB72-0296.

          1. If the diameter is between 21.3444 in. and 21.3476 in. (542.150 and 542.230 mm).

          1. Accept.

          2. More than Step.

          1. Reject.

        2. SB72-0296.

          1. If the diameter is between 21.3437 in. and 21.3484 in. (542.130 mm and 542.250 mm).

          1. Accept.

          2. More than Step.

          1. Reject.

    10. SUBTASK 72-41-21-220-391 Examine the Stage 7 Case Groove at Location 1121

    1. Refer to Figure.

      2. Scored.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      3. Galled.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      4. Wear.

        1. Pre SB72-0296.

          1. If the width of the groove is between 0.115 in. to 0.117 in. (2.93 mm to 2.98 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

        2. SB72-0296.

          1. If the width of the groove is between 0.115 in. to 0.119 in. (2.93 mm to 3.01 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    11. SUBTASK 72-41-21-220-757 Examine the Stage 7 Case Assembly Front Flange Rear Face at location 3

    1. Refer to Figure.

      2. Nicked, Scored or Galled.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

      3. Corrosion pitting.

      1. Repair, VRS6093 TASK 72-41-21-300-005 (REPAIR-005).

    12. Figure: Stage 7 Case - Inspection Locations

    Stage 7 Case - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised inspection criteria. (18VG258)