TASK 72-50-23-200-001 LPT Stage 7 Outer Shroud Seal Segment - Examine, Inspection-001

DMC:V2500-A0-72-50-2307-00A-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 72-50-23-200-001 LPT Stage 7 Outer Shroud Seal Segment - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-010

3A0666

General

This TASK gives the procedure for the inspection of the stage 7 seal shroud segment. For the other LP turbine outer static seals, refer to TASK 72-50-23-200-000 (INSPECTION/CHECK-000).

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

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

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

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 the SPM for data on these items.

Definitions 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 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 72-50-23-230-051 Examine the Stage 7 Shroud Seal Segment for Cracks

    1. Before Inspection, clean the stage 7 shroud seal segment. 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 7 shroud seal segment

        1. Cracked in areas A1 up to 0.040 in. (1.00 mm) maximum depth

        1. Accept

        2. Cracked sealing strip

        1. Repair, VRS4097 TASK 72-50-23-300-019 (REPAIR-019).

        3. Cracked braze in one complete side of the machine key bond provided the remaining key bond is free of cracks

        1. Accept

        4. Other than in (3)

        1. Repair, VRS4081 TASK 72-50-23-300-007 (REPAIR-007).

        5. Cracked in other area

        1. Reject

    2. SUBTASK 72-50-23-220-052 Examine the Stage 7 Shroud Seal Segment for Damage

      1. Examine the stage 7 shroud seal segment for nicks.

        1. Nicked, no limit in the number of nicks, no lifted material, maximum 0.005 in. (0.13 mm) in depth

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4076 TASK 72-50-23-300-003 (REPAIR-003).

      2. Examine the stage 7 shroud seal segment for dents.

        1. Dented, no limit in the number of dents, no lifted material, maximum 0.005 in. (0.13 mm) in depth

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4076 TASK 72-50-23-300-003 (REPAIR-003).

    3. SUBTASK 72-50-23-220-053 Examine the Honeycombs of the Stage 7 Shroud Seal Segment (01-010) for Damage

      1. Examine for unbonded areas.

        1. One unbonded area, maximum 20 adjacent cells

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4080 TASK 72-50-23-300-006 (REPAIR-006).

      2. Examine for damaged or bent cells.

        1. Up to three rows damaged, maximum length 0.800 in. (20.3 mm)

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4080 TASK 72-50-23-300-006 (REPAIR-006).

      3. Examine for rub damage.

        1. Smooth wear pattern, maximum 0.394 in. (10.0 mm) in width and maximum 0.060 in. (1.5 mm) in depth

        1. Accept

        2. Other than in (1)

        1. Repair, VRS4080 TASK 72-50-23-300-006 (REPAIR-006).

    4. SUBTASK 72-50-23-220-054 Examine the Sealing Strip of the Stage 7 Shroud Seal Segment (01-010) for Damage

      1. Examine the sealing strip for bends.

        1. Lightly bent

        1. Accept

        2. Totally out of shape

        1. Repair, VRS4097 TASK 72-50-23-300-019 (REPAIR-019).

    5. SUBTASK 72-50-23-220-055 Examine the Seal End Faces of the Stage 7 Shroud Seal Segment

      1. Examine for fretting.

        1. Fretted, maximum 0.002 in. (0.051 mm) in depth

        1. Accept

        2. More than in (1)

        1. Reject

    6. SUBTASK 72-50-23-220-056 Examine the Stage 7 Shroud Seal Segment for Wear

    1. Refer to: Figure

      2. Examine the stage 7 shroud seal segment at location D1 for wear.

        1. Worn.

          1. Dimension D1 between 0.3201 and 0.3141 in. (8.13 and 7.98 mm)

          1. Accept

          2. Other than in (a)

          1. Repair, VRS4081 TASK 72-50-23-300-007 (REPAIR-007).

      3. Examine the stage 7 shroud seal segment at location D2 for wear.

        1. Worn.

          1. Dimension D2 between 0.0925 and 0.0785 in. (2.35 and 1.99 mm)

          1. Accept

          2. Other than in (a)

          1. Reject

      4. Examine the stage 7 shroud seal segment at location D2 for fretting.

        1. Fretted, 0.002 in. (0.05 mm) maximum depth.

        1. Accept

        2. More than in (1)

        1. Reject

      5. Examine the stage 7 shroud seal segment at location D3 for wear.

        1. Worn.

          1. Dimension D3 between 0.0984 and 0.0886 in. (2.50 and 2.25 mm).

          1. Accept

          2. Other than in (a)

          1. Reject

      6. Examine the stage 7 shroud seal segment at location D4 for wear.

        1. Worn.

          1. Dimension D4 between 0.1201 and 0.1083 in. (3.05 and 2.75 mm).

          1. Accept

          2. Other than in (a)

          1. Reject

      7. Examine the stage 7 shroud seal segment at location A2 for fretting.

        1. Fretted, 0.004 in. (0.1 mm) maximum depth.

        1. Accept

        2. More than in (1)

        1. Reject

    7. Figure: Examine the stage 7 shroud seal segment

    Examine the stage 7 shroud seal segment

Requirements After Job Completion

Follow-On Conditions

NONE