TASK 72-45-20-220-001-A00 HPT Case And Vane Assembly - Examine, Inspection-001

DMC:V2500-A1-72-45-2000-00A-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

V2500-A1

Common Information

TASK 72-45-20-220-001-A00 HPT Case And Vane Assembly - Examine, Inspection-001

General

The worn "reject" is used after an assembly inspection statement to show that a higher level inspection and possible repair to the damaged part is necessary.

Do the higher level inspection procedure as found in the applicable Chapter/Section/Subject of this manual on the damaged part(s). It is not necessary to do the higher level inspection on parts that are serviceable to the interface inspection standard.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-45-20-220-057 Visually Examine the Outer Flange at Location 1

    1. Refer to: Figure

      2. Surface damage, dents, scratches, burrs and round-bottom nicks up to 0.010 in. (0.254 mm) in depth with no sharp edges

      1. Accept

      3. Sharp-bottom nicks

      1. Reject

      4. Cracks

      1. Reject

    2. SUBTASK 72-45-20-220-058 Visually Examine the Support Assembly Outer Flange Bolt Holes at Location 2

    1. Refer to: Figure

      2. Surface damage, dents, scratches, burrs and round-bottom nicks up to 0.010 in. (0.254 mm) in depth with no sharp edges

      1. Accept

      3. Sharp-bottom nicks

      1. Reject

      4. Cracks

      1. Reject

    3. SUBTASK 72-45-20-220-059 Visually Examine the Support Assembly Outer Flange at Location 3

    1. Refer to: Figure

      2. Round-bottom dents up to 0.250 in. (6.35 mm) in diameter and up to 0.010 in. (0.254 mm) in depth

      1. Accept

      3. Wear up to 25 percent of the contact surface

      1. Accept

      4. Other than A or B

      1. Reject

    4. SUBTASK 72-45-20-220-060 Visually Examine the Rear Turbine Seal of the Stage 2 Turbine Nozzle Assembly at Location 4

    1. Refer to: Figure

      2. Distortion

      1. Reject

      3. Cracks

      1. Reject

      4. Missing hardface on more than 10 percent of the contact surface

      1. Reject

    5. SUBTASK 72-45-20-220-061-A00 Visually Examine the Stage 2 Ceramic Outer Airseals at Location 5 (Pre SBE 72-0364)

    1. Refer to Figure.

      2. There is metal from the blades on the airseals

      1. Accept

        2. Any segment that has spalling or chipping down to the metal layer (dark color layer) for not more than:

          1. 50 per cent of the ceramic

          1. Accept

      3. There are cracks in the ceramic (white) layer of the coating

      1. Accept

      4. Other than B, C or D

      1. Reject

    6. SUBTASK 72-45-20-220-061-B00 Visually Examine the Stage 2 Ceramic Outer Airseals at Location 5 (SBE 72-0364)

    1. SBE 72-0364: Provide New Stage 2 High Pressure Turbine Duct Segments

    2. Refer to Figure.

      3. There is metal from the blades on the airseals

      1. Accept

        2. A segment has spalling or chipping on the top surface for more than 50 per cent of the ceramic surface area (38 duct segments). Any segment that has spalling or chipping down to the metal layer (dark color layer) for not more than:

          1. 50 per cent of the ceramic

          1. Accept

      4. There are cracks in the ceramic (white) layer of the coating

      1. Accept

    7. SUBTASK 72-45-20-220-062 Measure the Diameter of the Stage 2 Ceramic Outer Airseals at Location 5

    1. Refer to: Figure

      2. Measure the diameter at the center of each airseal (19 places).

        1. If the average diameter is less than 26.242 in. (666.547 mm)

        1. Accept

        2. More than (1)

        1. Reject

    8. SUBTASK 72-45-20-220-063 Visually Examine the Stage 2 Turbine Vane at Locations 6 and 10

      NOTE

      Location 10 includes the ID and OD platforms.

    1. Refer to: Figure

      2. One or more cracks up to 0.500 in. (12.7 mm) in length on the airfoil and platforms. Cracks up to 0.750 in. (19.050 mm) in length are permitted on vanes that are not adjacent. Cracks on the airfoil must be less than 0.050 in. (1.27 mm) wide. Platform cracks must be tight with no burning. The cracks do not make a closed loop and do not look like they will make a closed loop.

      1. Accept

        2. Corrosion or burning on the convex and concave sides of the airfoil and the ID and OD platform surfaces.

          1. Up to 1.0 sqin (645.16 sqmm) on each vane

          1. Accept

          2. Other than (1)

          1. Reject

      3. Chipped, eroded or spalled ceramic coating

      1. Accept

      4. Round-bottom dents up to 0.010 in. (0.254 mm) in depth

      1. Accept

      5. Dirt buildup, discoloration or metal particles

      1. Accept

    9. SUBTASK 72-45-20-220-084 Visually Examine the Honeycomb Seal Land at Location 7

    1. Refer to: Figure

      2. Knife-edge rub of less than 0.075 in. (1.905 mm)

      1. Accept

      3. Up to 19 vane clusters can have one-half cell-wide rub or honeycomb that is gone on the rear edge of the segments. Up to 10 vane clusters can have one cell-wide rub or honeycomb that is gone on the rear edge of the segments

      1. Accept

        NOTE

        Remove loose or unwanted material from inside the cells.

    10. SUBTASK 72-45-20-220-064 Visually Examine the Honeycomb Seal Lands at Location 9

    1. Refer to: Figure

      2. Knife-edge rub of less 0.075 in. (1.905 mm)

      1. Accept

      3. Up to 10 deformed or damaged cells on each vane

      1. Accept

        NOTE

        Remove loose or unwanted material from inside the cells.

    11. SUBTASK 72-45-20-220-085 Visually Examine the Honeycomb Seal Lands at Location 8

    1. Refer to: Figure

      2. Knife-edge rub of less than 0.075 in. (1.905 mm)

      1. Accept

      3. Up to 35 deformed or damaged cells on each ring segment

      1. Accept

        NOTE

        Remove loose or unwanted material from inside the cells.

    12. SUBTASK 72-45-20-220-065 Visually Examine the Stage 1 Ceramic Outer Airseals at Location 11

    1. Refer to Figure.

      2. There is metal from the blades on the airseals

      1. Clean

        2. Any segment that has spalling or chipping down to the metal layer (dark color layer) for not more than:

          1. 50 per cent of the ceramic

          1. Accept

      3. There are cracks in the ceramic (white) layer of the coating

      1. Accept

      4. Other than B, C or D

      1. Reject

    13. SUBTASK 72-45-20-220-066 Measure the Diameter of the Stage 1 Ceramic Outer Airseals at Location 11

    1. Refer to: Figure

      2. Measure the diameter at the center of each airseal.

        1. If the average diameter is less than 25.420 in. (645.668 mm)

        1. Accept

        2. More than (1)

        1. Reject

    14. SUBTASK 72-45-20-220-067 Visually Examine the Hardface on the Outer Airseal Supports at Location 12

    1. Refer to: Figure

      2. Chipped or spalled on more than 10 percent of the hardface area

      1. Reject

    15. SUBTASK 72-45-20-220-068 Visually Examine the Surface of the Case at Location 13

    1. Refer to: Figure

      2. Surface damage, dents, scratches, burrs and round-bottom nicks up to 0.010 in. (0.254 mm) in depth with no sharp edges

      1. Accept

      3. Sharp-bottom nicks

      1. Reject

      4. Cracks

      1. Reject

    16. SUBTASK 72-45-20-220-069 Visually Examine the Case Outer Flange and the Flange Bolt Holes at Location 14 and 15

    1. Refer to: Figure

      2. Surface damage, dents, scratches, burrs and round-bottom nicks up to 0.010 in. (0.254 mm) in depth with no sharp edges

      1. Accept

      3. Sharp-bottom nicks

      1. Reject

      4. Cracks

      1. Reject

    17. Figure: HP Turbine Case and Vane Assembly Inspection Locations

    HP Turbine Case and Vane Assembly Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE