TASK 72-45-27-200-002-B00 HPT Stage 2 Support - Examine, Inspection-002

DMC:V2500-A5-72-45-2701-00B-300A-C|Issue No:004.00|Issue Date:2019-08-01

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

V2500-A5

Common Information

TASK 72-45-27-200-002-B00 HPT Stage 2 Support - Examine, Inspection-002

Effectivity

FIG/ITEM PART NO.

01-010

2A1713

General

This TASK gives the procedure for the inspection of the stage 2 HPT support assembly. For the other stage 2 HPT support assembly parts, refer to TASK 72-45-27-200-000.

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 SPM TASK 70-20-00-200-501.

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

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.

The procedure for those parts which must have a crack test is given in SUBTASK 72-45-27-230-054. 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 SPM.

References

Refer to 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 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 72-45-27-230-054-001 Examine the Stage 2 HPT Support Assembly (01-010) for Cracks

    1. Refer to Figure.

    2. Clean the Part. Refer to TASK 72-45-27-100-000 (CLEANING-000).

      3. Do the crack test on the part that is given below. Use the applicable penetrant inspection procedure. Look carefully around the bolt holes at location 2 and the outer diameter bolt flange at location 1.

        PART IDENT TASK/SUBTASK

        Stage 2 HPT support assembly

        (Dip, Spray or

        Electrostatic Spray)

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-45-27-230-054-002 Examine the Stage 2 HPT Support Assembly (01-010) for Cracks

    1. Refer to Figure.

    2. Clean the part. Refer to TASK 72-45-27-100-000 (CLEANING-000).

      3. Do the crack test on the part that is given below. Use the applicable penetrant inspection procedures. Look carefully around the bolt holes, location 2 and the outer diameter bolt flange, location 1.

        PART IDENT TASK/SUBTASK

        Stage 2 HPT support assembly

        (Dip, Spray or

        Electrostatic Spray)

        1. Cracked.

        1. Reject.

    3. SUBTASK 72-45-27-220-067 Examine the Stage 2 HPT Support Assembly (01-010) Front and Rear Groove for Wear and Galling

    1. Refer to Figure.

      2. Examine the support front groove at location 8 and the rear groove at locations 5 and 6 for wear and galling.

        1. Wear or galling.

          1. Up to 0.010 in. (0.254 mm) in depth.

          1. Accept.

          2. Other than Step at location 8.

          1. Reject.

          3. Other than Step at locations 5 and 6.

          1. Reject.

    4. SUBTASK 72-45-27-220-068 Examine the Stage 2 HPT Support Assembly (01-010) Front and Rear Contact Faces for Wear

    1. Refer to Figure.

      2. Examine the support front contact face at location 10 and the rear contact face at location 3 for wear.

        1. Wear that you can see but you can not feel with your fingernail.

        1. Accept.

        2. Other than Step.

        1. Reject.

          NOTE

          There must be no related movement between the support flange and the turbine case. You must find the cause of any wear that is unsatisfactory.

    5. SUBTASK 72-45-27-220-069 Examine the Stage 2 HPT Support Assembly (01-010) Front and Rear Diameters for Wear

    1. Refer to Figure.

      2. Examine the support front diameter at location 9 and the rear diameter at location 4 for wear. Note that the diameters at locations 4 and 9 are offset.

        1. Wear that you can see but you can not feel with your fingernail.

        1. Accept.

        2. Other than Step at location 9.

        1. Repair, VRS3227 TASK 72-45-27-300-005 (REPAIR-005).

        3. Other than Step at location 4.

        1. Repair, VRS3229 TASK 72-45-27-300-006 (REPAIR-006).

    6. SUBTASK 72-45-27-220-070 Examine the Stage 2 HPT Support Assembly (01-010) for Bent, Loose and Worn Pins

    1. Refer to Figure.

      2. Examine the support for bent, loose and worn pins (19 positions) at location 7.

        1. Loose or bent.

        1. Repair, VRS3228 TASK 72-45-27-300-007 (REPAIR-007).

        2. Wear.

          3. Up to 10 percent on the first 25 percent of the pin length. Wear on the remaining pin length that you can see but can not feel with your fingernail.

          1. Accept.

          4. Other than Step.

          1. Repair, VRS3228 TASK 72-45-27-300-007 (REPAIR-007).

    7. SUBTASK 72-45-27-220-071 Examine the Stage 2 HPT Support Assembly (01-010) Front and Rear Diameters

    1. Refer to Figure.

      2. Examine the support front diameter at location 9 (Reference No. 1510).

        1. If the dimension is between 28.585 and 28.591 in. (726.06 and 726.21 mm) average.

        1. Accept.

        2. Write down the dimensions of the diameter.

        2. If the dimension is between 28.580 in.and 28.591 in. (725.93 mm and 726.21 mm) average.

        1. Accept part for select fit only.

          NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of Reference 1510. Refer to TASK 72-45-20-440-002-B00.

        2. Write down the dimension of the diameter.

        3. Other than Step or Step.

        1. Repair, VRS3227 TASK 72-45-27-300-005 (REPAIR-005).

      3. Examine the support rear diameter and offset at location 4 (Reference No. 5624).

        1. If the dimension is between 28.535 in. and 28.541 in. (724.79 mm and 724.94 mm) average and the offset is in limits.

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3229 TASK 72-45-27-300-006 (REPAIR-006).

    8. SUBTASK 72-45-27-220-072 Examine the Stage 2 HPT Support Assembly (01-010) for Plasma Spray Coat that is Chipped or Not There on the Front and Rear Diameters

      NOTE

      This inspection is only for the support assembly that incorporated the plasma spray coat on the rear diameter.

    1. Refer to Figure.

      2. Examine the support assembly at location 4 and 9 for plasma spray coat that is chipped or not there.

        1. Plasma coat that is chipped or not there.

          1. Full width up to 0.500 in. (12.70 mm) in circumference and 9.00 in. (228.60 mm) or more apart.

          1. Accept.

          2. Any amount when the chips do not go across the full width.

          1. Accept.

          3. Other than Step and Step.

          1. (Location 4, rear) Repair, VRS3229 TASK 72-45-27-300-006 (REPAIR-006), (Location 9, front) Repair, VRS3227 TASK 72-45-27-300-005 (REPAIR-005).

    9. Figure: Stage 2 HPT Support Assembly Inspection Locations

    Stage 2 HPT Support Assembly Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to update subtask information. (18VC578)