TASK 72-41-21-200-001-B00 HPC Stage 7 Rotor Path Ring - Examine, Inspection-001

DMC:V2500-A0-72-41-2120-00B-300A-C|Issue No:002.00|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 72-41-21-200-001-B00 HPC Stage 7 Rotor Path Ring - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

03-450

6A4161

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.

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 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 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:

Definitions 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 72-41-21-230-134 Examine the Stage 7 Rotor Path Ring for Cracks

    1. Clean the part. 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

        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 72-41-21-220-294 Examine the Stage 7 Rotor Path Ring Lining at Location 1050

    1. Refer to Figure.

      2. Scored.

      1. Reject.

      3. Chipped.

      1. Reject.

      4. Worn.

      1. Reject.

    3. SUBTASK 72-41-21-220-295 Examine the Stage 7 Rotor Path Ring Faces at Locations 1, 2 and 1180

    1. Refer to Figure.

      2. 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).

      3. 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).

      4. Location 1180.

        1. Worn.

          1. If the diameter is between 21.3516 in. and 21.3547 in. (542.330 mm and 542.410 mm).

          1. Accept.

          2. If the diameter is less than Step.

          1. Reject.

    4. SUBTASK 72-41-21-220-296 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).

    5. SUBTASK 72-41-21-220-297 Examine the Stage 7 Rotor Path Ring Groove at Location 1119

    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. Groove width.

        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. If the width of the groove is more than Step.

        1. Reject.

    6. SUBTASK 72-41-21-220-298 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. Location 1186, dowel hole diameter.

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

        1. Accept.

        2. If the diameter is other than Step.

        1. Reject.

    7. SUBTASK 72-41-21-220-299 Examine the Stage 7 Rotor Path Ring Surface Protection for Damage

      1. Damaged.

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

    8. SUBTASK 72-41-21-220-300 Examine the Stage 7 Rotor Path Ring all Remaining Surfaces

      1. Nicked, dented and 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).

    9. 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 step references. (14VR710)