TASK 72-41-21-200-013-C00 HPC Stage 12 Case - Examine, Inspection-013

DMC:V2500-A0-72-41-2112-00A-300A-C|Issue No:005.00|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 72-41-21-200-013-C00 HPC Stage 12 Case - Examine, Inspection-013

Effectivity

FIG/ITEM

PART NO.

04-600

6A6552

General

This TASK gives the procedure for the inspection of the Stage 12 Rotor Path Case Assembly.

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 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 those 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 discarded parts 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 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:

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 72-41-21-230-223 Examine the Stage 12 Rotor Path Case Assembly for Cracks

    1. Refer to Figure.

      2. Clean the parts.

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

        PART IDENT

        TASK/SUBTASK

        Stage 12 Rotor Path Case Assembly

        SPM TASK

        1. Cracked

          1. At location 9.

          1. Refer to Step.

          2. A crack at any other location.

          1. Reject.

    2. SUBTASK 72-41-21-220-584 Examine the Stage 12 Rotor Path Case Assembly Front and Rear Flanges at Face Locations 1, 2, and 1165

    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, VRS6101 TASK 72-41-21-300-020 (REPAIR-020)

      3. Scored.

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

        1. Accept

        2. More than in Step

        1. Repair, VRS6101 TASK 72-41-21-300-020 (REPAIR-020)

      4. Location 1165.

        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 72-41-21-220-585 Examine the Stage 12 Rotor Path Case Assembly Bolt Holes at Locations 3 and 4

    1. Refer to Figure.

      2. Burred edges

      1. Repair, VRS6101 TASK 72-41-21-300-020

      3. Scored

      1. Repair, VRS6101 TASK 72-41-21-300-020

    4. SUBTASK 72-41-21-220-586 Examine the Stage 12 Rotor Path Case Assembly Holes at Locations 5, 6, 1199 and 1163

    1. Refer to Figure.

      2. Location dowel hole 1199.

        1. Burred edges

        1. Repair, VRS6101 TASK 72-41-21-300-020

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

        1. Accept.

        3. If the diameter is more than in Step.

        1. Reject.

      3. Stop location hole 1163.

        1. Burred edges

        1. Repair, VRS6101 TASK 72-41-21-300-020

        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

        1. Reject

      4. Dowel holes 5 and 6.

        1. Burred edges

        1. Repair, VRS6101 TASK 72-41-21-300-020

        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 is Step

        1. Reject

    5. SUBTASK 72-41-21-220-587 Examine the Stage 12 Rotor Path Case Assembly Shank Nuts at Location 7 and 8

    1. Refer to Figure.

      2. Loose

      1. Repair, VRS6219 TASK 72-41-21-300-033

      3. Damaged

      1. Repair, VRS6219 TASK 72-41-21-300-033

      4. Measure the run-down torque.

        1. If the run-down torque is between 36 lbfin 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, VRS6219 TASK 72-41-21-300-033.

    6. SUBTASK 72-41-21-220-588 Examine the Stage 12 Rotor Path Case Assembly Location Dowel at Locations 1183 and 1184

    1. Refer to Figure.

      2. Loose

      1. Reject

      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. Reject

    7. SUBTASK 72-41-21-220-589 Examine the Stage 12 Rotor Path Case Assembly Borescope Access Hole at Location 9

    1. Refer to Figure.

      2. Burred edges

      1. Repair, VRS6101 TASK 72-41-21-300-020 (REPAIR-020)

      3. Scratched

      1. Repair, VRS6101 TASK 72-41-21-300-020 (REPAIR-020)

      4. Loose rivets

      1. Repair, VRS6352 TASK 72-41-21-300-081 (REPAIR-081)

      5. Cracks.

        1. Not more than one crack between the borescope access hole and any two rivet holes.

        1. Accept.

        2. More than in Step.

        1. Reject.

    8. SUBTASK 72-41-21-220-592 Examine the Stage 12 Rotor Path Case Assembly Lining at Location 1055

    1. Refer to Figure.

      2. Scored.

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Accept

        2. More than in Step

        1. Repair, VRS6024 TASK 72-41-21-300-022 (REPAIR-022)

      3. Chipped

      1. Repair, VRS6024 TASK 72-41-21-300-022 (REPAIR-022)

      4. Worn.

        1. If the lining radius is between 10.300 in. to 10.304 in. (261.62 mm to 261.722 mm)

        1. Accept

        2. More than 10.304 in. (261.722 mm)

        1. Repair, VRS6024 TASK 72-41-21-300-022 (REPAIR-022)

    9. SUBTASK 72-41-21-220-593 Examine the Stage 12 Rotor Path Case Assembly Groove at Location 1141

    1. Refer to Figure.

      2. Scored or galled.

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

        1. Accept

        2. More than in Step

        1. Reject

      3. Worn.

        1. If the width of the groove is between 0.1350 in. to 0.138 in. (3.43 mm to 3.51 mm).

        1. Accept.

        2. More than 0.138 in. (3.51 mm).

        1. Reject.

    10. SUBTASK 72-41-21-220-660 Examine the Dimension A

    1. Refer to Figure.

      2. If the dimension is between 0.159 in. and 0.1606 in. (4.04 mm and 4.080 mm)

      1. Accept

      3. More than in Step

      1. Repair, VRS6172 TASK 72-41-21-300-086 (REPAIR-086)

    11. SUBTASK 72-41-21-220-661 Examine the Stage 12 Rotor Path Ring Face at Location 3

    1. Refer to Figure.

      2. Galled

      1. Repair, VRS6172 TASK 72-41-21-300-086 (REPAIR-086)

      3. Scored

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

        1. Accept

        2. More than in Step

        1. Repair, VRS6172 TASK 72-41-21-300-086 (REPAIR-086)

    12. SUBTASK 72-41-21-220-591 Examine the Stage 12 Rotor Path Case Assembly Remaining Surfaces

      1. Nicked, galled or scored.

        1. Up to 0.002 in. (0.05 mm)

        1. Accept

        2. More than in Step

        1. Repair, VRS6101 TASK 72-41-21-300-020

    13. Figure: Stage 12 Rotor Path Case Assembly - Inspection Locations

    Stage 12 Rotor Path Case Assembly - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised inspection criteria. (18VG258)