TASK 72-45-25-200-004-A00 HPT Stage 2 Duct Segment - Examine, Inspection-004

DMC:V2500-A0-72-45-2501-00A-300A-C|Issue No:002.00|Issue Date:2015-11-01

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 72-45-25-200-004-A00 HPT Stage 2 Duct Segment - Examine, Inspection-004

Effectivity

FIG/ITEM

PART NO.

01-060

2A0108

01-060

2A1944

01-060

2A3362

General

This TASK gives the procedure for the inspection of the stage 2 HPT duct segment.

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 is examined. Refer to TASK 72-45-25-100-000 (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 SUBTASK 72-45-25-230-054. Do the test before the part is visually inspected.

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 70-20-00-200-501

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 72-45-25-230-054-001 Examine the Stage 2 HPT Duct Segments (01-060) for Cracks

    1. Refer to: Figure

    2. Clean the part. Refer to the TASK 72-45-25-100-000 (CLEANING-000).

      3. Do the test for cracks on the part that is given below. Examine the metal surfaces at location 10. Do not examine the ceramic and metallic coated areas at location 6. Look carefully at all the attachment and shiplap lugs at locations 1, 2, 8, 11 and 12. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 2 HPT duct segment

        SPM TASK 70-23-01-230-501

        1. Cracked

        1. Reject

    2. SUBTASK 72-45-25-230-054-002 Examine the Stage 2 HPT Duct Segments (01-060) for Cracks

    1. Refer to: Figure

    2. Clean the part. Refer to the TASK 72-45-25-100-000 (CLEANING-000).

      3. Do the test for cracks on the part that is given below. Examine the metal surfaces at location 10. Do not examine the ceramic and metallic coated areas at location 6. Look carefully at all the attachment and shiplap lugs at locations 1, 2, 8, 11 and 12. Use the applicable penetrant procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 2 HPT duct segment

        SPM TASK 70-23-01-230-501

        1. Cracked

        1. Reject

    3. SUBTASK 72-45-25-220-062 Examine the Stage 2 HPT Duct Segments (01-060) for Bent, Part Missing, Wear, and Unwanted Material on the Attachment and Shiplap Lugs

    1. Refer to: Figure

      2. Examine the duct segment for bent, part missing, wear, and unwanted material on the attachment and shiplap lugs.

        1. Wear.

          1. Up to 0.005 in. (0.127 mm) at locations 1, 2, 4, 7 and 12

          1. Accept

          2. Other than (a)

          1. Reject

        2. Bent or part missing at locations 1, 2, 8, 11 and 12

        1. Reject

        3. All quantities of unwanted material at location 3 (4 positions each side) between the shiplap lugs

        1. Accept

    4. SUBTASK 72-45-25-220-063 Examine the Stage 2 HPT Duct Segments (01-060) for Corrosion, Dents, Erosion, Nicks and Pits on the Base Metal Surfaces

    1. Refer to: Figure

      2. Examine the duct segment at location 1, 2, 10, 12, 13, 14, 15 for corrosion, dents, erosion, nicks, and pits on all the base metal surfaces.

        1. Corrosion, dents, erosion, nicks and pits.

          1. Attachment lugs (hooks) location 1 - nicks, dents, gouges, and similar surface imperfections are permitted to 0.005 in. (0.127 mm) depth, if they are smooth-bottomed and not in the fillet radii or ID surfaces under the lugs. Outside of the fillet radii and ID surfaces, isolated surface imperfections are permitted to 0.040 in. (1.016 mm) depth if they are smooth-bottomed and no two adjacent lugs are affected. The total affected area on each hook is less than 0.016 sq in. (10.322 sq mm) and no imperfection spans more than 0.100 in. (2.54 mm) circumferentially. For lugs with multiple surface imperfections only one may be greater than 0.005 in. (0.127 mm) deep

          1. Accept

          2. Sealing surfaces - (location 13, 14, 15) - nicks, dents, gouges, and similar surface imperfections are permitted to 0.005 in. (0.127 mm) depth

          1. Accept

          3. Shiplap lugs (tabs) surfaces (location 2, 12) - nicks, dents, gouges, and similar surface imperfections are permitted to 0.005 in. (0.127 mm) depth, if they are smooth-bottomed and not in the fillet radii or ID surfaces under the lugs. Outside of the fillet radii and ID surfaces, isolated surface imperfections are permitted to 0.040 in. (1.016 mm) depth if they are smooth-bottomed and no two adjacent lugs are affected. The total affected area on each lug is less than 0.016 sq in. (10.322 sq mm) and no imperfection spans more than 0.100 in. (2.54 mm) axially. For lugs with multiple surface imperfections only one may be greater than 0.005 in. (0.127 mm) deep

          1. Accept

          4. All other surfaces - nicks, dents, gouges and similar surface imperfections are permitted to 0.005 in. (0.127 mm) depth, if they are smooth-bottomed. Isolated surface imperfections are permitted to 0.040 in. (1.016 mm) depth if fillet radii, cooling holes and hook web are not affected, the imperfection is smooth-bottomed and total affected area is less than 0.050 sq in. (32.258 sq mm). All imperfections greater than 0.005 in. (0.127 mm) in depth must be separated by 0.010 in. (0.254 mm) minimum. Imperfections on axial and circumferential faces spanning more than half of the face width are not permitted

          1. Accept

          5. Other than (a), (b), (c), (d)

          1. Repair, VRS3465 TASK 72-45-25-300-005 (REPAIR-005)

    5. SUBTASK 72-45-25-220-064 Examine the Stage 2 HPT Duct Segments (01-060) for Erosion, Rub, Metal Transfer, Cracks, Chips and Spalls on the Ceramic and Metallic Coatings

    1. Refer to: Figure and Figure

      NOTE

      The ceramic and metallic coating locations are shown at location 6.

      2. Examine the duct segment for chips, spalls and areas when you see a difference between the adjacent areas of the ceramic coating. Refer to Figure.

        1. If the metallic coating at location 9 shows through the ceramic coating at location 5

        1. Reject

      2. Chips, spalls and areas when you see a difference between the adjacent areas at location 5.

        3. All quantities up to 25 percent of the surface areas

        1. Accept

        4. All quantities up to 0.125 in. (3.175 mm) in diameter and 0.035 in. (0.889 mm) in depth

        1. Accept

        5. Two areas up to 0.250 in. (6.35 mm) in diameter and 0.035 in. (0.889 mm) in depth

        1. Accept

        6. One area between 0.250 in. and 0.500 in. (6.35 and 12.7 mm) in diameter and up to 0.035in. (0.889 mm) in depth. This does not include the area up to 0.250 in. (6.35 mm) from the trailing edge

        1. Accept

        7. One area that is less than 0.250 in. (6.35 mm) from the trailing edge and is up to 0.250 in. (6.35 mm) in diameter and up to 0.035 in. (0.889 mm) in depth

        1. Accept

        8. Other than (a) thru (e)

        1. Reject

      3. Examine the duct segment for metal transfer and cracks on the ceramic and metallic coating. Refer to Figure.

        1. Metal transfer at location 2

        1. Repair, VRS3543 TASK 72-45-25-300-002 (REPAIR-002)

        2. All quantities of a checkered crack pattern at location 2

        1. Accept

          NOTE

          Example of a checkered crack pattern is shown at location 1.

        3. Axial and circumferential cracks that are parallel to the top surface at location 3 (each side) and location 5 (each end)

          1. Cracks in the grey metallic layers of the coating

          1. Reject

          2. Cracks in the white ceramic layers of the coating

          1. Accept

            NOTE

            Examples of the axial cracks are shown at location 4 and the circumferential cracks are shown at location 5.

      4. Examine the duct segments for erosion and rub at location 2. Refer to Figure.

        1. Erosion and rub.

          1. If the maximum radius that is temporarily marked on the surface is up to 13.108 in. (332.943 mm)

          1. Accept

            NOTE

            The maximum radius of the duct segment is temporarily marked on the duct segment surface when the HP Turbine Case and Vane Assembly is disassembled.

          2. Other than (a)

          1. Reject

    6. Figure: Stage 2 HPT Duct Segment Inspection Locations

    Stage 2 HPT Duct Segment Inspection Locations

    Figure: Stage 2 HPT Duct Segment Inspection Locations

    Stage 2 HPT Duct Segment Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised SPM task references to delete (dip only). (11VZ015)