TASK 72-44-10-200-001-F00 HPT Stage 1 Support Assembly - Examine, Inspection-001

DMC:V2500-A0-72-44-1001-00F-310A-C|Issue No:007.00|Issue Date:2021-02-01

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 72-44-10-200-001-F00 HPT Stage 1 Support Assembly - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-010

2A4085

01-060

2A3328

(Detail of 2A4085)

01-025

2A4088-01

(Detail of 2A4085)

General

This TASK gives the procedure for the inspection of the stage 1 HPT support assembly.

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 the 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 Step and Step. 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 70-20-00-200-501.

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 72-44-10-220-186 Examine the Stage 1 HPT Support Assembly (01-010) for Loose Rivets and Damaged Nut Plates with the Stage 1 HPT Seal and the Brush Seal Assembly Installed

    1. Refer to Figure.

      2. Examine the support assembly for loose nut plate rivets at Location 2 and damaged nut plates at Location 3.

        1. Loose rivets and damaged nut plates.

        1. Repair, VRS3272 TASK 72-44-10-300-002 (REPAIR-002)

      3. Examine the support assembly for loose or missing rivets at location 5.

        1. Loose or missing rivets.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

    2. SUBTASK 72-44-10-220-187 Examine the Brush Seal (01-025) for Damage or Wear with the Stage 1 HPT Seal and the Brush Seal Assembly Installed

    1. Refer to Figure.

      2. Examine the brush seal for damage, wear or missing material at Location 4.

        1. Damage, wear or missing material.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

    3. SUBTASK 72-44-10-220-204 Examine the reusable brush seal (01-025) and support assembly for damage or wear, if it was removed from the assembly for cleaning

    1. Refer to Figure, Figure, Figure and Figure.

      2. Measure the bristle height above the back plate. Refer to Figure, Index 1.

        1. 0.050 in. (1.270 mm ) minimum:

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      3. Measure the bristle pack thickness at 0.050 in. (1.270 mm) above the back plate in the undamaged areas. Areas with individual stray bristles are considered undamaged. Refer to Figure, Index 2.

        1. If the thickness is 0.085 in. - 0.190 in. (2.159 mm - 4.826 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      4. Measure the bristle pack thickness at 0.050 in. (1.270 mm) above the back plate in the damaged areas. Damaged locations must be no longer than 2.25 inches (57.15 mm) in length and must be separated by a minimum of 1.5 inches (38.1 mm). No more than seven locations are acceptable. Refer to Figure, Index 2.

        1. If bristles are clearly separated, minimum remaining thickness of 0.085 in. (2.159 mm). See Index 3.

        1. Accept.

        2. If bristles are not clearly separated, maximum thickness of 0.260 in. (6.604 mm). See Index 4.

        1. Accept.

        3. Other than Step or Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      5. Examine the brush seal at Location 4. Bristles shall not be burned or melted, and shall be free of weld material. Refer to Figure.

        1. If no burning, melting, or weld material at Location 4.

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      6. Examine the brush seal at Location 4 of Figure for bent, hooked, flared, worn, stray bristles, missing bristles, variable bristle pack density, and partial blowover. Full blowover is not acceptable. Refer to Figure.

        1. If bristle height (Step) and bristle pack thickness (Step and Step) requirements are met:

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      7. Examine the brush seal diameter at Location X. Refer to Figure.

        1. If the diameter is 26.664 in. - 26.672 inch (677.266 mm - 677.469 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

      8. Examine the support assembly diameter at Location Y. Refer to Figure.

        1. If the diameter is 26.642 in. - 26.646 in. (676.707 mm - 676.808 mm).

        1. Accept.

        2. If the diameter is not below 26.632 in. (676.453 mm).

        1. Repair, VRS3851 TASK 72-44-10-300-029 (REPAIR-029).

        3. Other than Step or Step.

        1. Reject.

    4. SUBTASK 72-44-10-220-188 Examine the Stage 1 HPT Support Assembly (01-010) for Axial Dimension with the Stage 1 HPT Seal Installed

    1. Refer to Figure.

      2. Examine the support assembly at Location 1 for the axial dimension.

        1. Axial dimension.

          1. 2.608 in. (66.24 mm) minimum.

          1. Accept.

          2. Other than Step.

          1. Replace by TASK 72-44-10-040-001 (DISASSEMBLY) and TASK 72-44-10-400-001 (ASSEMBLY) or Repair, VRS3678 TASK 72-44-10-300-021 (REPAIR-021).

    5. SUBTASK 72-44-10-040-052 Remove the Stage 1 HPT Support Seal (01-060) from the Stage 1 HPT Support Assembly (01-010)

      NOTE

      The stage 1 HPT seal must be removed to do the remaining inspections.

    1. Remove the Stage 1 HPT seal from the Stage 1 HPT support assembly by the procedures given in TASK 72-44-10-040-001 (DISASSEMBLY).

    6. SUBTASK 72-44-10-230-074 Examine the Stage 1 HPT Support Assembly (01-010) for Cracks

    1. Refer to Figure.

    2. Clean the part. Refer to TASK 72-44-10-100-001 (CLEANING-000).

      3. Do the test for cracks on the part that is given below. Look carefully at the bolt hole flange area at Location 1, the rear flange at Location 11, all the fillet radii at Locations 1, 5, 6 and 7 and the rear inner diameter lip at Location 4. Use the applicable penetrant inspection procedure.

        PART IDENT

        TASK/SUBTASK

        Stage 1 HPT support assembly

        (Dip or electrostatic spray)

        1. Cracks that extend outward from the front flange bolt hole surface, at location 1, which are less than 0.060 in. (1.52 mm) long

        1. Repair, VRS3650 TASK 72-44-10-300-022 (REPAIR-022).

        2. Cracks that extend outward from the front flange bolt hole surface, at location 1, which are greater than 0.060 in. (1.52 mm) long at a maximum of eight bolt holes within a 30 degree quadrant with a minimum 60 degree interval between quadrants.

        1. Repair, VRS3767 TASK 72-44-10-300-026 (REPAIR-026).

        3. Cracks at Location 1 other than Step and Step.

        1. Reject.

        4. Cracks at Location 11.

        1. Repair, VRS3637 TASK 72-44-10-300-020 (REPAIR-020).

        5. Cracks at Locations 4, 5, 6 and 7.

        1. Reject.

    7. SUBTASK 72-44-10-220-189 Examine the Stage 1 HPT Support Assembly (01-010) for Contact Wear, Corrosion, Dents and Scratches

    1. Refer to Figure.

      2. Examine the support assembly for contact wear, corrosion, dents, nicks and scratches.

        1. Corrosion and nicks.

        1. Repair, VRS3273 TASK 72-44-10-300-003 (REPAIR-003).

          2. Scratches, contact wear, nicks, surface damage (burrs).

            1. Not more than 0.005 in. (0.13 mm) in depth with no sharp edges.

            1. Accept.

            2. Not more than 0.015 in. (0.38 mm) in depth.

            1. Repair, VRS3273 TASK 72-44-10-300-003 (REPAIR-003).

            3. Contact wear/fretting more than 0.015 in. (0.38 mm) deep at Location 8. Damage must not be longer than 0.550 in. (13.97 mm) and must not extend into Location 7 fillet radius.

            1. Repair, VRS3559 TASK 72-44-10-300-019 (REPAIR-019).

            4. Contact wear/fretting more than 0.015 in. (0.38 mm) deep at Location 9. Damage must not be longer than 0.200 in. (5.08 mm), must not extend into Location 7 fillet radius and must not extend into location 10 bolt holes.

            1. Repair, VRS3559 TASK 72-44-10-300-019 (REPAIR-019).

            5. Other than Step, Step, Step or Step.

            1. Reject.

          3. Dents.

            1. Round bottom dents not more than 0.250 in. (6.35 mm) in diameter and 0.010 in. (0.25 mm) in depth.

            1. Accept.

            2. Dents on the outer diameter flange at Location 1.

            1. Repair, VRS3273 TASK 72-44-10-300-003 (REPAIR-003).

            3. Other than Step and Step.

            1. Repair, VRS3273 TASK 72-44-10-300-003 (REPAIR-003) or Repair, VRS3619 TASK 72-44-10-300-024 (REPAIR-024).

    8. SUBTASK 72-44-10-220-190 Examine the Stage 1 HPT Support Assembly (01-010) for Wear on the Rear Seal Groove

    1. Refer to Figure.

      2. Examine the support assembly at Location 4 for wear on the rear seal groove.

        1. Wear.

        1. Reject.

    9. SUBTASK 72-44-10-220-191 Examine the Stage 1 HPT Support Assembly (01-010) for Plugged Metering Holes

    1. Refer to Figure.

      2. Examine the support assembly at Location 3 for plugged metering holes.

        1. Plugged holes.

        1. Repair, VRS3460 TASK 72-44-10-300-006 (REPAIR-006).

    10. SUBTASK 72-44-10-220-192 Examine the Stage 1 HPT Support Assembly (01-010) for Plasma Spray Coat that is Chipped or Missing on the Outer Rear Diameter

    1. Refer to Figure.

      2. Examine the support assembly at Location 2 for plasma spray coat that is chipped or missing.

        1. Plasma coat that is chipped or missing.

          1. Not more than five percent of the total area and not more than 0.50 in. (12.7 mm) in a continuous length.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS3129 TASK 72-44-10-300-007 (REPAIR-007).

    11. SUBTASK 72-44-10-220-193 Examine the Stage 1 HPT Support Assembly (01-010) for Plasma Spray Coat that is Chipped, Worn or Missing on the Rear Inner Flange

    1. Refer to Figure.

      2. Examine the support assembly at Locations 5 and 12 for plasma spray coat that is chipped, worn or missing.

        1. Plasma coat that is chipped or missing.

        1. Repair, VRS3766 TASK 72-44-10-300-025 (REPAIR-025).

        2. Plasma coat that is worn.

          3. Not more than 0.003 in. (0.08 mm).

          1. Accept.

          4. Other than (a).

          1. Repair, VRS3766 TASK 72-44-10-300-025 (REPAIR-025)

    12. SUBTASK 72-44-10-220-194 Examine the Stage 1 HPT Support Assembly (01-010) Rear Flange Inner Diameter for Parallelism

    1. Refer to Figure.

      NOTE

      If the measured dimensions in a free condition are not satisfactory, a held condition is permitted. All dimensions apply when Surface F is flat by 0.005 in. (0.13 mm) and Diameter G maintains a clearance envelope of 28.242 in. (717.35 mm) in a free or held condition. Hold the support assembly only on Surfaces F and H and on Diameter G.

      2. Examine the support assembly at Location 3 for parallelism.

        1. Parallel.

          1. Must be parallel within 0.005 in. (0.13 mm) to the front outer diameter flange rear surface.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS3766 TASK 72-44-10-300-025 (REPAIR-025).

    13. SUBTASK 72-44-10-220-195 Examine the Stage 1 HPT Support Assembly (01-010) for the Outer Diameter on the Front and Rear Flanges

    1. Refer to Figure.

      NOTE

      The diameter at location 2253 is offset as shown in Figure
      If the measured dimensions in a free condition are not satisfactory, a held condition is permitted.
      All dimensions apply when Surface F is flat by 0.005 in. (0.13 mm) and Diameter G maintains a clearance envelope of 28.242 in. (717.35 mm) in a free or held condition.
      Hold the support assembly only on Surfaces F and H and on Diameter G.

      2. Examine the support assembly at Locations 2252 and 2253 for the outer diameter on the front and rear flanges.

        1. If the diameter is between 28.235 in. and 28.241 in. (717.17 mm and 717.32 mm).

        1. Accept.

        2. Write down the dimension of the diameter.

        2. If the diameter is between 28.230 in. and 28.241 in. (717.04 mm and 717.32 mm).

        1. Accept the part for select fit only.

        2. Write down the dimension of the diameter.

        3. NOTE

          This part can be used only if the mating part has a diameter that will result in a fit of Reference No. 2252 and 2253. Refer to TASK 72-00-44-420-001-001 (INSTALLATION-001) and TASK 72-00-45-420-001-B01 (INSTALLATION-001, CONFIG-002).

          Minimum diameter 28.190 in. (716.03 mm) at Location 2253.

        1. Repair, VRS3129 TASK 72-44-10-300-007 (REPAIR-007).

        4. Minimum diameter 28.190 in. (716.03 mm) at Location 2252.

        1. Repair, VRS3270 TASK 72-44-10-300-008 (REPAIR-008).

    14. SUBTASK 72-44-10-220-196 Examine the Stage 1 HPT Support Assembly (01-010) for the Outer Diameter Flange and the Forward Inner Flange Thickness

    1. Refer to Figure.

      2. Examine the support assembly at Location 1 for front flange thickness.

        1. If the dimension is between 0.105 in. and 0.112 in. (2.67 mm and 2.84 mm).

        1. Accept.

        2. Other than Step.

        1. Reject.

      3. Examine the support assembly at Location 4 for forward inner flange thickness.

        1. If the dimension is between 0.110 in. and 0.120 in. (2.79 mm and 3.05 mm).

        1. Accept.

        2. Other than Step.

        1. Refer to Repair, VRS3559 TASK 72-44-10-300-019 (Repair-019) or Repair, VRS3818 TASK 72-44-10-300-028 (Repair-028).

    15. SUBTASK 72-44-10-220-197 Examine the Stage 1 HPT Support Assembly (01-010) for the Rear Seal Diameter

    1. Refer to Figure.

      NOTE

      If the measured dimensions in a free condition are not satisfactory, a held condition is permitted. All dimensions apply when Surface F is flat by 0.005 in. (0.13 mm) and Diameter G maintains a clearance envelope of 28.242 in. (717.35 mm) in a free or held condition. Hold the support assembly only on Surfaces F and H and on Diameter G.

      2. Examine the support assembly at Location 2001 at the gage point for the rear seal diameter.

        1. If the dimension at the gage point is between 26.962 in. and 26.972 in. (684.835 mm and 685.088 mm).

        1. Accept.

        2. Write down the dimension of the diameter.

        2. Other than Step.

        1. Reject.

    16. SUBTASK 72-44-10-220-198 Examine the Stage 1 HPT Support Assembly (01-010) for the Axial Dimension from the Rear Face of the Front Flange to the Rear Face of the Rear Vane Groove

    1. Refer to Figure.

      2. NOTE

        If the measured dimensions in a free condition are not satisfactory, a held condition is permitted. All dimensions apply when Surface F is flat by 0.005 in. (0.13 mm) and Diameter G maintains a clearance envelope of 28.242 in. (717.35 mm) in a free or held condition. Hold the support assembly only on Surfaces F and H and on Diameter G.

        Examine the support assembly at Location 2 for the axial dimension.

        1. Axial dimension.

          1. If the dimension is between 2.305 in. and 2.315 in. (58.55 mm and 58.80 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    17. SUBTASK 72-44-10-230-075 Examine the Stage 1 HPT Seal (01-060) for Cracks

    1. Clean the part. Refer to TASK 72-44-10-100-000 (CLEANING-000).

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

        PART IDENT

        TASK/SUBTASK

        Stage 1 HPT seal

        (Dip or Spray)

        1. Cracked.

        1. Reject.

    18. SUBTASK 72-44-10-220-199 Examine the Stage 1 HPT Seal (01-060) for Chipped or Flaked Plasma Spray Coating on the Rear Contact Face

    1. Refer to Figure.

      2. Examine the Stage 1 HPT seal at Location 6 for chipped or flaked plasma spray coating on the rear contact face.

        1. Chipped and flaked.

          1. Not more than 10 percent of plasma spray coating on contact face.

          1. Accept.

          2. More than 10 percent of plasma spray coating on contact face.

          1. Repair, VRS3678 TASK 72-44-10-300-021 (REPAIR-021).

    19. SUBTASK 72-44-10-220-200 Examine the Stage 1 HPT Seal (01-060) for Wear on the Inner Diameter

    1. Refer to Figure.

      2. Examine the stage 1 HPT seal at location 5 for wear on the inner diameter.

        1. Wear.

          1. If the diameter is between 26.935 in. and 26.945 in. (684.15 mm and 684.40 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    20. SUBTASK 72-44-10-220-201 Examine the Stage 1 HPT Seal (01-060) for Flat and Distortion of the Original Axial Shape in a Free Condition on the Outer Diameter Rear Contact Face

    1. Refer to Figure.

      2. Examine the Stage 1 HPT seal at Location 1 for the 0.305 in. and 0.315 in. (7.75 mm and 8.00 mm) axial height shape at 25 equally spaced positions in a free condition for flat and distortion.

        1. Flat and distortion.

          1. If all the 25 measurements are 0.012 in. (0.35 mm) or less of each other.

          1. Accept.

          2. Other than Step.

          1. Reject.

      3. Examine the seal at Location 2 for a seal mark that is continuous around the full circumference on the outer diameter rear contact face.

        1. Seal mark.

          1. If the contact face has a mark that is continuous around the full circumference.

          1. Accept.

          2. Other than Step

          1. Reject.

    21. SUBTASK 72-44-10-220-202 Examine the Stage 1 HPT Seal (01-060) for the Axial Height Dimension and Wear on the Outer Diameter Rear Contact Face

    1. Refer to Figure.

      NOTE

      The seal may be measured in a free or held condition. If the seal is measured in a held condition, hold the seal at Surface E. The measurement in a held condition can be done with the seal installed on the Stage 1 Support Assembly.

      2. Examine the Stage 1 HPT seal at Location 1 for the axial height dimension on the outer diameter rear contact face.

        1. Axial height.

          1. If the dimension is between 0.309 in. and 0.322 in. (7.85 mm and 8.18 mm).

          1. Accept.

          2. If the dimension is less than 0.309 in. (7.85 mm).

          1. Repair, VRS3678 TASK 72-44-10-300-021 (REPAIR-021).

            NOTE

            When you use a 10X magnification glass, the coating must look more porous and rougher than the base material which will look smooth and constant.

      3. Examine the seal at Location 2 for wear through the coating at the seal mark that is continuous around the full circumference on the outer diameter rear contact face. Use a 10X magnification glass.

        1. Wear.

          1. If the base material is not shown.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3678 TASK 72-44-10-300-021 (REPAIR-021).

    22. SUBTASK 72-44-10-220-203 Examine the Stage 1 HPT Seal (01-060) for Wear on the Inner Conical Diameter

    1. Refer to Figure.

      NOTE

      The seal conical gage point diameter at Location 2001 is 26.960 in. to 26.964 in. (684.78 mm to 684.89 mm). Refer to the following dimensions:
      Location 3 is the 24 to 26 degree conical surface.
      Location 4 is the 0.078 in. (1.98 mm) gage point dimension.

      2. Examine the Stage 1 HPT seal at Location 2001 for wear on the inner conical diameter.

        1. Wear.

          1. If the conical gage point diameter is between 26.960 in. to 26.964 in. (684.78 mm to 684.89 mm).

          1. Accept.

          2. Other than Step.

          1. Reject.

    23. SUBTASK 72-44-10-440-054 Install the Stage 1 HPT Seal (01-060) on the Stage 1 HPT Support Assembly (01-010)

    1. Install the Stage 1 HPT seal on the Stage 1 HPT support assembly by the procedures given in TASK 72-44-10-440-001 (ASSEMBLY).

    24. SUBTASK 72-44-10-440-055 If removed for cleaning, install the brush seal on the Stage 1 HPT Support Assembly (01-010).

    1. Install the brush seal on the Sstage 1 HPT Support Sssembly per Repair, VRS3771 TASK 72-44-10-300-027 (REPAIR-027).

    25. Figure: Stage 1 HPT Support Assembly Inspection Locations

    Stage 1 HPT Support Assembly Inspection Locations

    Figure: Stage 1 HPT Support Assembly Inspection Locations

    Stage 1 HPT Support Assembly Inspection Locations

    Figure: Stage 1 HPT Support Assembly Inspection Locations

    Stage 1 HPT Support Assembly Inspection Locations

    Figure: Stage 1 HPT Seal Inspection Locations

    Stage 1 HPT Seal Inspection Locations

    Figure: Brush Seal and Support Assembly Inspection Locations

    Brush Seal and Support Assembly Inspection Locations

    Figure: Brush Seal Inspection Locations

    Brush Seal Inspection Locations

    Figure: Brush Seal Inspection Conditions

    Brush Seal Inspection Conditions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised and added procedural step. (18VC137)