TASK 72-41-34-200-009-B00 HPC Stage 6 Unison Rings - Examine, Inspection-009 - SBE 72-0431

DMC:V2500-A0-72-41-3426-00B-300A-C|Issue No:002.00|Issue Date:2021-08-01

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 72-41-34-200-009-B00 HPC Stage 6 Unison Rings - Examine, Inspection-009 - SBE 72-0431

Effectivity

FIG/ITEM PART NO.

06-440

6A8097

06-540

6A8098

General

This TASK gives the procedure for the inspection of the stage 6 variable vane actuating ring.

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the EIPC.

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 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 satisfactory.

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, TASK 70-02-02-350-501

Record and Control of the Lives of Parts, TASK 70-05-00-220-501

Inspection of Parts, TASK 70-20-01-200-501

Some data on these items is 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 72-41-34-230-131 Examine the Stage 6 Variable Vane Actuating Ring for Cracks

    1. Clean the parts. Refer to TASK 72-41-34-100-000.

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

      PART IDENT TASK/SUBTASK

      Stage 6 variable vane actuating ring

      TASK 70-23-02-230-501

      3. Cracked

      1. Reject

    2. SUBTASK 72-41-34-220-416 Examine the Stage 6 Variable Vane Actuating Ring Bodies at Locations 1 and 2

    1. Refer to Figure.

      2. Nicked.

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

        1. Accept

        2. More than in Step.

        1. Reject.

      3. Scored.

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

        1. Accept

        2. More than in Step.

        1. Reject.

      4. Scratched.

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

        1. Accept

        2. More than in Step.

        1. Reject.

        3. Loss of surface protection

        1. Repair, VRS6126 TASK 72-41-34-300-053 (REPAIR-053)

    3. SUBTASK 72-41-34-220-418 Examine the Stage 6 Variable Vane Actuating Rings Brackets at Locations 3, 4 and 5

    1. Refer to Figure.

      2. Screw thread inserts at locations 3, 4 and 5.

        1. Broken

        1. Repair, VRS6155 TASK 72-41-34-300-013 (REPAIR-013)

        2. Crossed threads

        1. Repair, VRS6155 TASK 72-41-34-300-013 (REPAIR-013)

        3. Worn excessively

        1. Repair, VRS6155 TASK 72-41-34-300-013 (REPAIR-013)

        4. Threads that are not there

        1. Repair, VRS6155 TASK 72-41-34-300-013 (REPAIR-013)

    4. SUBTASK 72-41-34-220-419 Examine the Stage 6 Variable Vane Actuating Rings Bushes at Location 6

    1. Refer to Figure.

      2. Inner bore.

        1. Scored

        1. Reject

        2. Scratched

        1. Reject

        3. Worn.

          1. Less than 0.201in. (5.107 mm) in diameter

          1. Accept

          2. More than in Step.

          1. Reject

      3. Bushes that are not there

      1. Reject

      4. Excessive bush movement (side to side)

      1. Reject

    5. Figure: Stage 6 upper and lower unison rings - inspection locations

    Stage 6 upper and lower unison rings - inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedural steps. (20VG080A)

Change Type:

Added step references. (Editorial)