TASK 72-50-23-200-004-B00 LPT Stage 3 Outer Shroud Seal Segment - Examine, Inspection-004

DMC:V2500-A0-72-50-2303-00B-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 72-50-23-200-004-B00 LPT Stage 3 Outer Shroud Seal Segment - Examine, Inspection-004

Effectivity

FIG/ITEM PART NO.

01-350

3A1916

General

This TASK gives the procedure for the inspection of the stage 3 shroud seal segment.

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-00-200-501.

All parts must be cleaned before any part is examined. Refer to the TASK 72-50-23-100-000 (CLEANING-000).

All 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 test before the part is visually examined.

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.

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 could be shown to be necessary at a later date.

All 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 numbers are in the SPM.

References

Refer to SPM for data on these items.

Definition of Damage, SPM TASK 70-02-02-350-501

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

Inspection of Parts, SPM TASK 70-20-00-200-501

Some data on these items is contained in this TASK. For more data on these items refer to the SPM.

Method of Testing for Cracking 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 72-50-23-230-070 Examine the Stage 3 Shroud Seal Segment for Cracks

    1. Clean the parts. Refer to TASK 72-50-23-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts that are given below. Use the applicable penetrant procedure.

        PART IDENT TASK/SUBTASK

        Stage 3 shroud seal segment

        SPM TASK 70-23-02-230-501

        1. Cracked in area A3 not more than 0.240 in. (6.00 mm)

        1. Accept

        2. Cracked in area A3 more than in (1) and not more than to 0.600 in. (15.24 mm)

        1. Repair, VRS4416 TASK 72-50-23-300-042 (REPAIR-042)

        3. More than in (2)

        1. Reject

        4. Cracks within areas A4 starting at fillet radius

        1. Accept

        5. Cracks starting in areas A4 and extending into areas A3

        1. Repair, VRS4416 TASK 72-50-23-300-042 (REPAIR-042)

        6. More than in (4) or (5)

        1. Reject

    2. SUBTASK 72-50-23-220-096 Examine the Stage 3 Shroud Seal Segment for Surface Damage

      1. Nicked, dented.

        1. Not more than 0.005 in. (0.13 mm) maximum depth, no lifted material

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4278 TASK 72-50-23-300-036 (REPAIR-036)

    3. SUBTASK 72-50-23-220-097 Examine the Honeycombs of the Stage 3 Shroud Seal Segment for Damage

      1. Unbonded areas.

        1. One unbonded area, maximum 20 adjacent cells

        1. Accept

        2. More than in (1)

        1. Repair, VRS4279 TASK 72-50-23-300-037 (REPAIR-037)

      2. Damaged or bent cells.

        1. Not more than three rows damaged, maximum length 0.800 in. (20.30 mm)

        1. Accept

        2. More than in (1)

        1. Repair, VRS4279 TASK 72-50-23-300-037 (REPAIR-037)

      3. Rub damage.

        1. Smooth wear pattern, maximum 0.394 in. (10.00 mm) in width and maximum 0.060 in. (1.50 mm) in depth

        1. Accept

        2. More than in (1)

        1. Repair, VRS4279 TASK 72-50-23-300-037 (REPAIR-037)

    4. SUBTASK 72-50-23-220-098 Examine the Stage 3 Shroud Seal Segment for Wear

    1. Refer to Figure.

      2. Examine the stage 3 shroud seal segment in area A1 for fretting.

        1. Fretted.

          1. Not more than 0.004 in. (0.10 mm) maximum depth

          1. Accept

          2. More than in (a)

          1. Repair, VRS4104 TASK 72-50-23-300-024 (REPAIR-024)

      3. Examine the stage 3 shroud seal segment in area A2 for fretting.

        1. Fretted.

          1. Not more than 0.003 in. (0.08 mm) in depth

          1. Accept

          2. More than in (a)

          1. Reject

      4. Examine the stage 3 shroud seal segment in area A5 for fretting.

        1. Fretted.

          1. Not more than 0.008 in. (0.20 mm) maximum depth

          1. Accept

          2. More than in (a)

          1. Repair, VRS4491 TASK 72-50-23-300-050 (REPAIR-050)**

      5. Examine the stage 3 shroud seal segment at dimension D1 for wear.

        1. Worn, measure dimension D1.

          1. Not more than 0.2842 in. (7.22 mm)

          1. Accept

          2. More than in (a)

          1. Repair, VRS4491 TASK 72-50-23-300-050 (REPAIR-050)**

      6. Examine the stage 3 shroud seal segment at dimension D2 for wear.

        1. Worn, measure dimension D2.

          1. Not less than 0.1535 in. (3.90 mm)

          1. Accept

          2. Less than in (a)

          1. Reject

      7. Examine the stage 3 shroud seal segment at dimension D3 for wear.

        1. Worn, measure dimension D3.

          1. Not less than 0.0650 in. (1.650 mm)

          1. Accept

          2. Less than in (a) and not less than 0.0472 in. (1.200 mm)

          1. Repair, VRS4557 TASK 72-50-23-300-060 (REPAIR-060)

          3. Less than in (b)

          1. Reject

    5. Figure: Examine the Stage 3 Shroud Seal Segment

    Examine the Stage 3 Shroud Seal Segment

Requirements After Job Completion

Follow-On Conditions

NONE