TASK 72-50-00-200-005-A00 LPT Stage 6 Inner Air Seal - Examine, Inspection-005

DMC:V2500-A0-72-50-0021-00A-310A-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 72-50-00-200-005-A00 LPT Stage 6 Inner Air Seal - Examine, Inspection-005

Effectivity

FIG/ITEM PART NO.

01-240

3A0078

General

This TASK gives the procedure for the inspection of the stage 6 turbine inner air seal.

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

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

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 TASK 72-50-00-100-000 (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 TASK numbers are in the SPM.

Reference

Refer to the 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 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 72-50-00-230-071 Examine the Stage 6 Turbine Inner Air Seal for Cracks

    1. Refer to Figure.

    2. Clean the parts. Refer to TASK 72-50-00-100-000 (CLEANING-000).

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

        PART IDENT TASK/SUBTASK

        Stage 6 Turbine Inner Air Seal

        1. Cracked in all areas except area A1

        1. Reject

        2. Cracked in area A1

        1. Repair, VRS4018 TASK 72-50-00-300-001 (REPAIR-001)

    2. SUBTASK 72-50-00-220-107 Examine the Stage 6 Turbine Inner Air Seal for Surface Damage

    1. Refer to Figure.

      2. Examine the surface in all areas except in area A1.

        1. Nicked, dented

        1. Repair, VRS4020 TASK 72-50-00-300-003 (REPAIR-003)

    3. SUBTASK 72-50-00-220-108 Examine the Stage 6 Turbine Inner Air Seal for Surface Damage

    1. Refer to Figure.

      2. Examine the surface in area A1.

        1. Nicked, dented.

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

          1. Accept

          2. More than in (a)

          1. Repair, VRS4018 TASK 72-50-00-300-001 (REPAIR-001)

        2. Bent.

          1. Maximum deflection 0.010 in. (0.25 mm) and maximum depth 0.040 in. (1.0 mm) if the contour is round

          1. Accept

          2. More than in (a)

          1. Repair, VRS4018 TASK 72-50-00-300-001 (REPAIR-001)

    4. SUBTASK 72-50-00-220-133 Examine the Stage 6 Inner Turbine Air Seal for Fretting

    1. Refer to Figure.

      2. Examine the surface in area A2.

        1. Fretted.

          1. Not more than 0.002 in. (0.05 mm) maximum depth

          1. Accept

          2. More than in (a)

          1. Reject

    5. SUBTASK 72-50-00-220-109 Examine the Stage 6 Turbine Inner Air Seal for Surface Damage

    1. Refer to Figure.

      2. Examine the surface in area A3.

        1. Fretted.

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

          1. Accept

          2. More than in (a)

          1. Reject

        2. Nicked, dented

        1. Repair, VRS4020 TASK 72-50-00-300-003 (REPAIR-003)

    6. SUBTASK 72-50-00-220-110 Examine the Stage 6 Turbine Inner Air Seal for Wear

    1. Refer to Figure.

      2. Measure the diameter D1 for wear at the two seal fins at 120, 240 and 360 degrees. Get an average dimension.

        1. If the sum of both diameters is minimum 11.007 in. (279.59 mm)

        1. Accept

        2. Less than in (1)

        1. Reject

    7. SUBTASK 72-50-00-220-111 Examine the Stage 6 Turbine Inner Air Seal Snap Diameter for Wear

    1. Refer to Figure.

      2. Measure the diameter D2 at 120, 240 and 360 degrees for wear. Get an average dimension.

        1. Worn.

          1. Not less than 8.3497 in. (212.08 mm)

          1. Accept

          2. Less than in (a)

          1. Repair, VRS4021 TASK 72-50-00-300-004 (REPAIR-004)

    8. SUBTASK 72-50-00-220-133 Examine the Stage 6 Inner Turbine Air Seal for Fretting

    1. Refer to Figure.

      2. Examine the inner turbine air seal in Area A2 for fretting. Use dial gage, dial indicator with needle insert and horizontal rotating table.

        1. Fretted.

          1. Maximum depth of fret is 0.002 in. (0.05 mm)

          1. Accept

          2. More than in (a)

          1. Reject

    9. Figure: Examine the Stage 6 Turbine Inner Air Seal

    Examine the Stage 6 Turbine Inner Air Seal

Requirements After Job Completion

Follow-On Conditions

NONE