TASK 72-45-15-200-001 HPT Stage 1 Rotating Rear Seal - Examine, Inspection-001

DMC:V2500-A0-72-45-1500-00A-310A-C|Issue No:002.00|Issue Date:2020-08-01

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 72-45-15-200-001 HPT Stage 1 Rotating Rear Seal - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-020

2A0045

General

This TASK gives the procedure for the inspection of the stage 1 HPT air seal. For the other parts of the stage 1 HPT airseal (rear), refer to TASK 72-45-15-200-000 (INSPECTION-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 parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

All the parts must be cleaned before any part is examined. Refer to TASK 70-10-00-100-501.

The procedure for those parts which must have a crack test is given in SUBTASK 72-45-15-230-051. 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

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.

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 72-45-15-230-051-001 Examine the Stage 1 HPT Air Seal (01-020) for Cracks

    1. Clean the part. Refer to TASK 72-45-15-100-000 (CLEANING-000).

      2. Do the crack test on the part that is given below. Use the applicable penetrant inspection procedure.

        PART IDENT TASK/SUBTASK

        Stage 1 HPT air seal

        TASK

        (Dip or Spray)

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-45-15-230-051-002 Examine the Stage 1 HPT Air Seal (01-020) for Cracks

    1. Clean the part. Refer to TASK 72-45-15-100-000 (CLEANING-000).

      2. Do the crack test on the part that is given below. Use the applicable penetrant inspection procedure.

        PART IDENT TASK/SUBTASK

        Stage 1 HPT air seal

        TASK

        (Dip or Spray)

        1. Cracked.

        1. Reject.

    3. SUBTASK 72-45-15-220-051 Examine the Stage 1 HPT Air Seal (01-020) Front Outer Contact Surface for Wear

    1. Refer to Figure.

      2. Examine the stage 1 HPT air seal, location 4, front outer contact surface for wear.

        1. Scattered pits not more than 0.004 in. (0.10 mm).

        1. Accept.

        2. Scattered pits more than 0.004 in. (0.10 mm).

        1. Reject.

        3. Nicks, dents and scratches not more than 0.004 in. (0.10 mm).

        1. Accept.

        4. Nicks, dents and scratches more than 0.004 in. (0.10 mm).

        1. Reject.

    4. SUBTASK 72-45-15-220-052 Examine the stage 1 HPT Air Seal (01-020) Rear contact Surface for Wear (DELETED)

    1. This subtask has been deleted.

    5. SUBTASK 72-45-15-220-053 Examine the Stage 1 HPT Air Seal (01-020) Fir Tree Load Bearing Surfaces for Wear

    1. Refer to Figure.

      2. Examine the stage 1 HPT air seal, location 5, fir tree load bearing surfaces for wear.

        1. Wear less than 0.001 in. (0.025 mm).

        1. Accept.

        2. Wear more than 0.001 in. (0.025 mm).

        1. Reject.

    6. SUBTASK 72-45-15-220-054 Examine the Stage 1 HPT Air Seal (01-020) for Corrosion, Dents and Nicks

    1. Refer to Figure.

      2. Examine the air seal at location 1 for corrosion, dents and nicks.

        1. Corrosion, dents and nicks less than 0.005 in. (0.13 mm).

        1. Accept.

        2. Corrosion, dents and nicks more than 0.005 in. (0.13 mm).

        1. Reject.

      3. Examine the air seal attachment surfaces at location 5 for corrosion, dents and nicks.

        1. Corrosion, dents or nicks less than 0.002 in. (0.05 mm).

        1. Accept.

        2. Corrosion, dents or nicks more than 0.002 in. (0.05 mm).

        1. Reject.

      4. Examine the air seal at location 6 for corrosion, dents and nicks.

        1. Corrosion, dents or nicks less than 0.001 in. (0.03 mm).

        1. Accept.

        2. Corrosion, dents or nicks more than 0.001 in. (0.03 mm).

        1. Reject.

      5. Examine the air seal at location 7 for corrosion, dents and nicks.

        1. Corrosion, dents or nicks less than 0.003 in. (0.08 mm).

        1. Accept.

        2. Corrosion, dents or nicks more than 0.003 in. (0.08 mm).

        1. Reject.

      6. Examine the air seal other than locations 1, 5, 6 or 7 for corrosion, dents and nicks.

        1. Corrosion, dents or nicks less than 0.010 in. (0.25 mm).

        1. Accept.

        2. Corrosion, dents or nicks more than 0.010 in. (0.25 mm).

        1. Reject.

    7. SUBTASK 72-45-15-220-055 Examine the Stage 1 HPT Air Seal (01-020) for the Axial Dimension

      CAUTION

      YOU MUST DO AN INSPECTION FOR ALL THE SIXTY FOUR (64) AIRSEALS INDIVIDUALLY. IF THE INDIVIDUAL INSPECTION IS UNSATISFACTORY, IT CAN CAUSE FIT PROBLEMS DURING ASSEMBLY PROCEDURE.

    1. Refer to Figure, Figure, and Figure.

      2. Visually inspect zone "X" for wear. Measure axial dimension 1552 in zone "X", taking measurement in area showing wear, if present. If measuring with calipers, ensure that measurement is taken with caliper jaws inside zone "X".

        1. Axial dimension.

          1. If the dimension is between 0.274 and 0.276 in. (6.96 and 7.01 mm).

          1. Accept.

          2. If the dimension is 0.272 in. (6.91 mm) or more and less than 0.274 in. (6.96 mm).

          1. Accept part for select fit only.

          2. Write down the dimension.

            NOTE

            This part can only be used, if the mating parts dimensions will result in fit of reference No. 1552. Refer to TASK 72-45-10-440-001-A00, TASK 72-45-10-440-001-C00, TASK 72-45-10-440-001-D00.

          3. Other than Step or Step.

          1. Reject.

    8. SUBTASK 72-45-15-220-056 Examine the Stage 1 HPT Air Seal (01-020) for Wear on the Seal

    1. Refer to Figure.

      2. Examine the stage 1 HPT air seal, location 2, for wear on the seal.

        1. Wear.

          1. Up to 0.800 in. (20.32 mm) maximum length.

          1. Accept.

          2. Other than Step.

          1. Reject.

    9. Figure: Stage 1 HPT Air Seal Inspection Locations

    Stage 1 HPT Air Seal Inspection Locations

    Figure: Stage 1 HPT Air Seal Inspection Locations

    Stage 1 HPT Air Seal Inspection Locations

    Figure: Correct Measurement Of Axial Dimension 1552

    Correct Measurement Of Axial Dimension 1552

    Figure: Incorrect Measurement Of Axial Dimension 1552

    Incorrect Measurement Of Axial Dimension 1552

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised procedural steps, figures and deleted subtask. (20VC043)

Change Type:

Corrected Figure 2 title. (20VC043A)