TASK 72-50-32-300-025 LPT Stage 3 Blade - Blend Repair, Repair-025 (VRS4203)

DMC:V2500-A0-72-50-3203-00A-649A-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

All

Common Information

TASK 72-50-32-300-025 LPT Stage 3 Blade - Blend Repair, Repair-025 (VRS4203)

Effectivity

FIG/ITEM PART NO.

01-200

3A0883

01-200

3A2053

Material of component

PART IDENT

SYMBOL

MATERIAL

Stage 3 turbine blade

Inconel 100

General

Price and availability - none

The practices and processes referred to in the procedure by the TASK numbers are in the SPM.

NOTE

  1. For more equipment and materials necessary to do this repair refer to the SPM TASK 70-35-21-350-501.

  2. Equivalent equipment may be used.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-32-350-076 Blend Repair the Stage 3 Turbine Blade (01-200)

    1. Refer to Figure.

      NOTE

      1. Refer to the SPM TASK 70-35-21-350-501 for blending surface damage.

      2. For local blending use a length to depth ratio of 10:1 minimum, refer to Figure.

      3. The minimum distance between the blends is 0.200 in. (5.08 mm).

      4. Do not blend repair dents except on leading edge and trailing edge.

      5. Nicks within acceptable limits do not require blend repair. If present, remove raised material only.

      6. Repeated blending in one place is acceptable to the specified maximum depth, measured from the initial unblended surface.

      7. Area A8 must not be blended by this repair.

      2. Blend the surface in area A9.

      1. Maximum permitted blend depth from initial surface 0.020 in. (0.51 mm).

        Minimum material thickness after blending is 0.040 in. (1.02 mm).

        The blended area must not be more than 20 percent of area A9.

      3. Blend the surface in area A10.

      1. Maximum permitted blend depth from initial surface 0.010 in. (0.25 mm).

        Minimum material thickness after blending is 0.040 in. (1.02 mm) minimum.

        The blended area must not be more than 20 percent of area A10.

      4. Blend the surface in area A11.

      1. Maximum permitted blend depth from initial surface 0.010 in. (0.25 mm).

        The blended area must not be more than 20 percent of area A11.

      5. Blend the surface in area A12.1.

      1. Maximum permitted blend depth from initial surface 0.060 in. (1.52 mm).

        The maximum permitted total depth of opposite blends on leading and trailing edge is 0.060 in. (1.52 mm).

        The total length of all blends on leading edge must not be more than 10 percent of the span.

        The minimum transition radius to the outer shroud is 0.080 in. (2.03 mm).

        Use a length to depth ratio of 5:1 minimum.

      6. Blend the surface in area A12.2.

      1. Maximum permitted blend depth from initial surface 0.030 in. (0.76 mm).

        The maximum permitted total depth of opposite blends on leading and trailing edge is 0.060 in. (1.52 mm).

        The total length of all blends on leading edge must not be more than 10 percent of the span.

        Use a length to depth ratio of 6:1 minimum.

      7. Blend the surface in area A12.3.

      1. Maximum permitted blend depth from initial surface 0.030 in. (0.76 mm).

        The maximum permitted total depth of opposite blends on leading and trailing edge is 0.060 in. (1.52 mm).

        The total length of all blends on leading edge must not be more than 10 percent of the span.

        Use a length to depth ratio of 6:1 minimum.

      8. Blend the surface in area A13.1.

      1. Maximum permitted blend depth from initial surface 0.030 in. (0.76 mm).

        The maximum permitted total depth of opposite blends on leading and trailing edge is 0.060 in. (1.52 mm).

        The total length of all blends on trailing edge must not be more than 10 percent of the span.

        Use a length to depth ratio of 5:1 minimum.

      9. Blend the surface in area A13.2.

      1. Maximum permitted blend depth from initial surface 0.030 in. (0.76 mm).

        The maximum permitted total depth of opposite blends on leading and trailing edge is 0.060 in. (1.52 mm).

        The total length of all blends on trailing edge must not be more than 10 percent of the span.

        Use a length to depth ratio of 5:1 minimum.

      10. Blend the surface in area A14.

      1. Maximum permitted blend depth from initial surface 0.010 in. (0.25 mm).

        The blended area must not be more than 40 percent of area A14.

      11. Blend the surface in area A15.

      1. Maximum permitted blend depth from initial surface 0.014 in. (0.36 mm).

        The blend area must not be more than 40 percent of area A15.

      12. Blend the surface in area A16.

      1. Maximum permitted blend depth from initial surface 0.014 in. (0.36 mm).

        The blended area must not be more than 20 percent of area A16.

      13. Blend the surface in area A17.

      1. No blends permitted.

      14. Blend the surface in area A18.

      1. No blends permitted.

      15. Blend the surface in area A19.

      1. No blends permitted.

      16. Blend the surface in area A20.

      1. No blends permitted.

      17. Blend the surface in area A21.

      1. No blends permitted.

      18. Blend the surface in area A22.

      1. No blends permitted.

      19. Blend the surface in area A23.

      1. No blends permitted.

    2. SUBTASK 72-50-32-220-098 Do the Post Repair Inspection

      1. Examine the surface of the blended areas visually.

      1. The blended surface must be as smooth as the initial surface.

        Edges and corners are not permitted.

      2. Examine the blended areas dimensionally.

      1. Measure the dimensions of the blended areas. Refer to Figure.

        The blend ratio must be in the limits.

    3. SUBTASK 72-50-32-350-133 Do the Post Repair

      1. Restore the coating if the removed coating is less than 1.000 sqin. (645.16 sqmm) total area (shrouds and airfoils together).

      1. Refer to VRS4205 TASK 72-50-32-300-027 (REPAIR-027).

      2. Restore the coating if the removed coating is more than 1.000 sqin. (645.16 mm) total area (shrouds and airfoils together).

      1. Refer to VRS4208 TASK 72-50-32-300-030 (REPAIR-030).

    4. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE