TASK 72-41-34-200-012-A00 HPC Stage 4 Unison Ring Connector Bridges - Examine, Inspection-012

DMC:V2500-A0-72-41-3434-00A-300A-C|Issue No:001.00|Issue Date:2013-11-01

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 72-41-34-200-012-A00 HPC Stage 4 Unison Ring Connector Bridges - Examine, Inspection-012

Effectivity

FIG/ITEM PART NO.

04-200

6A2528

04-200

6A4340

General

This TASK gives the procedure for the inspection of the stage 4 actuating ring connector.

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 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.

A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.

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 the SPM.

References

Refer to the 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 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 72-41-34-230-061 Examine the Stage 4 Actuating Ring Connector 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 4 actuating ring connector

        1. Cracked

        1. Reject

    2. SUBTASK 72-41-34-220-110 Examine the Stage 4 Actuating Ring Connector Bodies at Location 1

    1. Refer to: Figure

      2. Nicked.

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

        1. Accept

        2. More than in step A.(1)

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

      3. Scored.

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

        1. Accept

        2. More than in step B.(1)

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

      4. Scratched.

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

        1. Accept

        2. More than in step C.(1)

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

    3. SUBTASK 72-41-34-220-111 Examine the Stage 4 Actuating Ring Connector Surfaces at Locations 2 and 3

    1. Refer to: Figure

      2. Galled.

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

        1. Accept

        2. More than in step A.(1)

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

      3. Scratched.

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

        1. Accept

        2. More than in Step B.(1)

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

    4. SUBTASK 72-41-34-220-112 Examine the Stage 4 Actuating Ring Connector Bushes at Location 4

    1. Refer to: Figure

      2. Wear on the bore.

        1. If the diameter is between 0.196 to 0.197in. (4.978 to 5.004 mm)

        1. Accept

        2. If the diameter is more than in step A.(1)

        1. Repair, VRS6264, TASK 72-41-34-300-026 (REPAIR-026)

      3. Scored.

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

        1. Accept

        2. More than in step B.(1)

        1. Repair, VRS6264, TASK 72-41-34-300-026 (REPAIR-026)

      4. Bushes that are not there

      1. Repair, VRS6264, TASK 72-41-34-300-026 (REPAIR-026)

    5. SUBTASK 72-41-34-220-113 Examine the Stage 4 Actuating Ring Connector Bolt Holes at Locations 5 and 6

    1. Refer to: Figure

      2. Scored.

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

        1. Accept

        2. More than in step A.(1)

        1. Repair, VRS6193 TASK 72-41-34-300-004 (REPAIR-004)

      3. Burred

      1. Repair, VRS6193 TASK 72-41-34-300-004 (REPAIR-004)

      4. Elongated

      1. Reject

    6. SUBTASK 72-41-34-220-550 Examine the Stage 4 Bridge Piece Weld Bead at Location 7

      NOTE

      SUBTASK applies only to part number 6A4340.

    1. Refer to Figure.

      2. Galled or fretted.

        1. Up to 0.0250 in. (0.635 mm) in depth

        1. Repair, VRS6193, TASK 72-41-34-300-004 (REPAIR-004)

        2. More than (1)

        1. Reject

    7. Figure: Stage 4 Actuating Ring Connector - Inspection Locations

    Stage 4 Actuating Ring Connector - Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE