TASK 72-50-00-200-005-C00 LPT Stage 6 Inner Air Seal - Examine, Inspection-005

DMC:V2500-A0-72-50-0021-00C-310A-C|Issue No:003.00|Issue Date:2015-08-01

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 72-50-00-200-005-C00 LPT Stage 6 Inner Air Seal - Examine, Inspection-005

Effectivity

FIG/ITEM

PART NO.

01-240

3A3047

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 the parts must be cleaned before any part is examined. Refer to the SPM TASK 70-11-03-300-503.

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 72-50-00-230-072 Examine the Stage 6 Turbine Inner Air Seal for Cracks

    1. Refer to Figure.

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

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

        PART IDENT

        TASK/SUBTASK

        Stage 6 Turbine Inner Air Seal

        1. Cracked in all areas other than area A1

        1. Reject

        2. Cracked in area A1

        1. Refer to VRS4628 TASK 72-50-00-300-011 (REPAIR-011).

    2. SUBTASK 72-50-00-220-118 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. Refer to VRS4627 TASK 72-50-00-300-010 (REPAIR-010).

    3. SUBTASK 72-50-00-220-119 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 Step

          1. Refer to VRS4628 TASK 72-50-00-300-011 (REPAIR-011).

        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 Step

          1. Refer to VRS4628 TASK 72-50-00-300-011 (REPAIR-011).

    4. SUBTASK 72-50-00-220-120 Examine the Stage 6 Turbine Inner 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 Step

          1. Reject

    5. SUBTASK 72-50-00-220-121 Examine the Stage 6 Turbine Inner Air Seal for Fretting

    1. Refer to Figure.

      2. Examine the surface in area A3.

        1. Fretted

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

          1. Accept

          2. More than in Step

          1. Reject

    6. SUBTASK 72-50-00-220-122 Examine the Stage 6 Turbine Inner Air Seal for Fretting

    1. Refer to Figure.

      2. Examine the surface in area A4.

        1. Fretted

          1. Not more than 0.004 in. (0.10 mm) maximum depth, no raised material

          1. Accept

          2. Not more than 0.004 in. (0.10 mm) maximum depth, with raised material

          1. Refer to VRS4627 TASK 72-50-00-300-010 (REPAIR-010).

    7. SUBTASK 72-50-00-220-123 Examine the Stage 6 Turbine Inner Air Seal for Wear

    1. Refer to Figure.

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

        1. Not less than 5.504 in. (139.79 mm)

        1. Accept

        2. Less than in Step

        1. Reject

    8. SUBTASK 72-50-00-220-124 Examine the Stage 6 Turbine Inner Air Seal Mating 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 8.350 in. (212.08 mm)

          1. Accept

          2. Less than in Step

          1. Refer to VRS4629 TASK 72-50-00-300-0010 (REPAIR-012)**.

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

    Examine the Stage 6 Inner Turbine Air Seal

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Updated links to VRS4628/A0. (EC 14VM534)