TASK 72-41-21-200-001-C00 HPC Stage 7 Rotor Path Ring - Examine, Inspection-001

DMC:V2500-A0-72-41-2120-00C-300A-C|Issue No:003.00|Issue Date:2021-02-01

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 72-41-21-200-001-C00 HPC Stage 7 Rotor Path Ring - Examine, Inspection-001

Effectivity

FIG./ITEM PART NO.

PART NO.

03-450

6A5992

03-450

6A7626

General

This TASK gives the procedure for the inspection of the stage 7 rotor path ring.

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.

All the parts must be cleaned before any part is examined.

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 IAE.

The procedure for those parts which have a crack test is given in Step. Do the crack test before the part is visually examined.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in the 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 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 70-20-01-200-501.

Some data on these items are 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 72-41-21-230-053 Examine the Stage 7 Rotor Path Ring for Cracks

      1. Clean the part.

      1. 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

          Stage 7 rotor path ring

          SPM TASK

          1. Cracked.

            1. From the bolthole at Location 4 extending towards outer diameter at not more than one position.

            1. Accept.

            2. Other than Step.

            1. Reject.

    2. SUBTASK 72-41-21-220-493-A00 Examine the Stage 7 Rotor Path Lining at Location 1050 (6A5992 only)

    1. Refer to Figure.

      2. Scored.

        1. Not more than 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than Step.

        1. Incorporate SBE 72-0369.

      3. Chipped

      1. Incorporate SBE 72-0369.

      4. Worn.

        1. If the lining radius is between 10.2818 in. and 10.2858 in. (261.160 mm and 261.260 mm).

        1. Accept.

        2. If more than 10.2858 in. (261.260 mm).

        1. Incorporate SBE 72-0369.

    3. SUBTASK 72-41-21-220-493-B00 Examine the Stage 7 Rotor Path Lining at Location 1050 (6A7626 only)

    1. Refer to Figure.

      2. Scored.

        1. Not more than 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than Step.

        1. Refer to Repair, VRS9671 TASK 72-41-21-300-091 (REPAIR-091).

      3. Chipped

      1. Refer to Repair, VRS9671 TASK 72-41-21-300-091 (REPAIR-091).

      4. Worn.

        1. If the lining radius is between 10.2818 in. and 10.2858 in. (261.160 mm and 261.260 mm).

        1. Accept.

        2. If more than 10.2858 in. (261.260 mm).

        1. Refer to Repair, VRS9671 TASK 72-41-21-300-091 (REPAIR-091).

    4. SUBTASK 72-41-21-220-062 Examine the Stage 7 Rotor Path Ring Faces at Locations 1, 2 and 1180

    1. Refer to Figure.

      2. Locations 1, 2 and 1180.

        1. Galled.

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

          1. Accept.

          2. More than Step.

          1. Repair, VRS6092 TASK 72-41-21-300-002 (REPAIR-002).

        2. Scored.

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

          1. Accept.

          2. More than Step.

          1. Repair, VRS6092 TASK 72-41-21-300-002 (REPAIR-002).

      3. Location 1180.

        1. 6A5992 only (SBE 72-0235 and Pre SBE 72-0369).

          1. If the diameter is between 21.1574 in. and 21.1606 in. (537.400 mm and 537.480 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

        2. 6A7626 only (Post SBE 72-0369).

          1. If the diameter is between 21.1567 in. and 21.1614 in. (537.380 mm and 537.500 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    5. SUBTASK 72-41-21-220-063 Examine the Stage 7 Rotor Path Ring Bolt Holes at Location 4

    1. Refer to Figure.

      2. Burred edges.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6092 TASK 72-41-21-300-002 (REPAIR-002).

      3. Scratched.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6092 TASK 72-41-21-300-002 (REPAIR-002).

    6. SUBTASK 72-41-21-220-065 Examine the Stage 7 Rotor Path Ring Groove at Location 1119

    1. Refer to Figure.

      2. Scored or galled.

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

        1. Accept.

        2. More than Step.

        1. Reject.

      3. Worn.

        1. 6A5992 only (Pre SBE 72-0369).

          1. If the width of the groove is between 0.1154 in. and 0.1173 in. (2.930 mm and 2.980 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

        2. 6A7626 only (Post SBE 72-0369).

          1. If the width of the groove is between 0.115 in. and 0.119 in. (2.930 mm and 3.010 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    7. SUBTASK 72-41-21-220-066 Examine the Stage 7 Rotor Path Ring Location Dowel Hole at Location 1186

    1. Refer to Figure.

      2. Burred edges.

      1. Reject.

      3. Scratched.

      1. Reject.

      4. Worn.

        1. If the diameter is between 0.315 in. and 0.329 in. (8.00 mm and 8.36 mm).

        1. Accept.

        2. More than Step.

        1. Reject.

    8. SUBTASK 72-41-21-220-068 Examine the Stage 7 Rotor Path Ring Surface Protection for Damage

      1. Damaged.

      1. Repair, VRS6161 TASK 72-41-21-300-004 (REPAIR-004).

    9. SUBTASK 72-41-21-220-196 Examine the Stage 7 Rotor Path Ring all Remaining Surfaces

      1. Nicked, dented or scratched.

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

        1. Accept.

        2. More than Step.

        1. Repair, VRS6092 TASK 72-41-21-300-002 (REPAIR-002).

    10. Figure: Stage 7 rotor path ring - inspection locations

    Stage 7 rotor path ring - inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update VRS number. (18VG427)