TASK 72-41-12-200-002-B00 HPC Stage 9 - 12 Drum Disk - Examine, Inspection-002

DMC:V2500-A0-72-41-1201-00B-310A-C|Issue No:007.00|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

All

Common Information

TASK 72-41-12-200-002-B00 HPC Stage 9 - 12 Drum Disk - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-600

6A4131

01-600

6A7545

01-600

6A7574

General

This TASK gives the procedure for the inspection of the rear HPC disks.

Fig/Item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.

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

The policy that is necessary for inspection is given in SPM TASK 70-20-01-200-501.

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 Step and Step 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 the 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 subsequent date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

References

Refer to SPM for data on these items:

Definition of Damage, SPM TASK 70-02-02-350-501,

Recording and Control of the Lives of Parts, SPM TASK 70-05-00-220-501,

Inspection of parts, SPM TASK 70-20-01-200-501.

Some data on these items are contained in this TASK. For more data on these items refer to SPM:

Method of Testing for Crack Indications,

Chemical Processes,

Surface Protection.

NOTE

To identify the consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-005 ADHESIVE TAPE (MASKING)LOCALCoMat 02-005

Spares

NONE

Safety Requirements

CAUTION

THE WORD FOCUS, SPECIFIED IN SUBTASK TITLES, INDICATES CRITICAL LOCATIONS ON COMPONENTS TO WHICH SPECIAL ATTENTION MUST BE GIVEN.

Procedure

    1. SUBTASK 72-41-12-230-060 Examine the Rear HPC Disk for Cracks

    1. NOTE

      The examination of the whole component using Ultra High Sensitivity Fluorescent Penetrant is required.

      Clean the Part. Refer to the TASK 72-41-12-100-000 (CLEANING-000).

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

        PART IDENT

        TASK/SUBTASK

        Rear HPC Disk

        (Dip or Spray)

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-41-12-230-081 Inspect the Rear HPC Disk for Cracks

    1. NOTE

      This SUBTASK is an additional examination to the Ultra High Sensitivity Fluorescent Penetrant Inspection of the whole component. The additional examination using Ultra High Sensitivity Fluorescent Penetrant is only required for component areas that are specified within this SUBTASK.

      Refer to Figure, Figure, Figure and Figure.

    2. Clean the parts. Refer to TASK 72-41-12-100-000 (CLEANING-000).

    3. Mask the areas adjacent to inspection locations with CoMat 02-005 ADHESIVE TAPE (MASKING). This will prevent glare during inspection from Fluorescent Penetrant which may have soaked into the ceramic.

    4. Do a focus inspection of the Rear HPC Disk for cracks according to TASK 72-41-12-200-004, Subtask 72-41-12-230-079.

    3. SUBTASK 72-41-12-220-076 Examine the Rear HPC Disk for Damage on the Front Slots

    1. Refer to Figure.

      2. Examine the disk at Locations 1, 2 and 4 for damage.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Other than Step.

        1. Reject.

      3. Examine the disk at Locations 3 and 5 for damage.

        1. Surface damage that is not more than 0.0030 in. (0.076 mm) in depth.

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6087 TASK 72-41-12-300-016 (REPAIR-016).

    4. SUBTASK 72-41-12-220-077 Examine the Rear HPC Disk for Damage on the Front Flange and Bent Segments

    1. Refer to Figure.

      2. Examine the disk at Location 6 for damage on the front flange.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Damage that goes into the surface roughness texture and is 0.1250 in. (3.175 mm) from the slots and is not more than 0.0030 in. (0.076 mm) in depth.

        1. Accept.

        3. Other than Step or Step.

        1. Repair, VRS6087 TASK 72-41-12-300-016 (REPAIR-016).

      3. Examine the disk at Location 6 for bent segments.

        1. Bent segments.

        1. Reject.

    5. SUBTASK 72-41-12-220-078 Examine the Rear HPC Disk for Damage and Wear on the Rear Bolt Holes

    1. Refer to Figure.

      2. Examine the disk at Location 1 for damage on the rear bolt holes (40 Locations).

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Other than Step.

        1. Reject.

      3. Examine the disk at Location 1 for wear on the bolt holes (40 Locations).

        1. If the bolt holes are more than 0.3139 in. (7.973 mm) in diameter.

        1. Reject.

    6. SUBTASK 72-41-12-220-079 Examine the Rear HPC Disk for Damage on the Rear Flange and Bent Segments

    1. Refer to Figure.

      2. Examine the disk at Location 2 for damage on the rear flange.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Damage that goes into the surface roughness texture and is 0.1250 in. (3.175 mm) from the bolt holes and is not more than 0.0030 in. (0.076 mm) in depth.

        1. Accept.

        3. Other than Step or Step.

        1. Reject.

      3. Examine the disk at Locations 3 and 4 for damage.

        1. Surface damage that is not more than 0.0030 in. (0.076 mm) in depth.

        1. Accept.

        2. Other than Step.

        1. Reject.

      4. Examine the disk at Location 5 for damage.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Other than Step.

        1. Reject.

    7. SUBTASK 72-41-12-220-080 Examine the Rear HPC Disk for Damage in the Vent Holes

    1. Refer to Figure.

      2. Examine the disk at Location 1 for damage in the vent holes.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6087 TASK 72-41-12-300-016 (REPAIR-016).

    8. SUBTASK 72-41-12-220-081 Examine the Rear HPC Disk for Internal Damage

    1. Refer to Figure.

      2. Examine the disk at Locations 2, 4, 13 and 15 for damage.

        1. If the damage is on opposite sides and the total depth is not more than 0.0030 in. (0.076 mm).

        1. Accept.

        2. If the damage in areas other than opposite sides is not more than 0.0030 in. (0.076 mm).

        1. Accept.

        3. For Locations 2 and 4, other than Step or Step.

        1. Reject.

        4. For Locations 13 and 15, other than Step or Step.

        1. Repair, VRS6087 TASK 72-41-12-300-016 (REPAIR-016).

      3. Examine the disk at Locations 3, 12, 14, 16 and 17 for damage.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. For Locations 3 and 16, other than Step

        1. Reject.

        3. For Locations 12, 14 and 17, other than Step.

        1. Repair, VRS6087 TASK 72-41-12-300-016 (REPAIR-016).

      4. Examine the disk at Location 5, 7, 9 and 11 for damage.

        1. Nicks, dents, scratches or tool marks that do not go into the surface roughness texture.

        1. Accept.

        2. Other than Step.

        1. Reject.

      5. Examine the disk at Locations 6, 8 and 10 for damage.

        1. If the damage is on opposite sides and the total depth is not more than 0.0030 in. (0.076 mm).

        1. Accept.

        2. If the damage in areas other than opposite sides is not more than 0.0030 in. (0.076 mm).

        1. Accept.

        3. Other than Step or Step.

        1. Reject.

      6. Weld spatter.

        1. Inner cavity weld spatter.

        1. Accept.

    9. SUBTASK 72-41-12-220-117 Examine the Rear HPC Disk (72-41-12,01-600) for Damage in the Blade Slots, the Loading Slots and the Locking Slots

    1. Refer to Figure.

    2. Examine the HPC disk for damage in the blade slots, loading slots and the locking slots.

      3. Examine the slots at zone A.

        Zone A

        -

        Dovetail slot bedding area plus 0.050 in. (1.27 mm) below the bottom limit and the complete length of the slot on both sides

        NOTE

        All disks that have been used in service will have bedding areas that are easy to see.

        1. Galled.

          1. Bedding witness or mark to no discernible depth.

          1. Accept.

          2. Not more than 0.001 in. (0.03 mm) in depth.

          1. Accept.

          3. Not more than 0.002 in. (0.05 mm) in depth

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

          4. More than in Step.

          1. Reject.

      4. Examine the slots at zone B.

        Zone B

        -

        The area in the center of the dovetail slot

        1. Galled or fretted.

          1. Not more than 0.002 in. (0.05 mm) in depth.

          1. Accept.

          2. More than in Step.

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

        2. Scored, nicked or dented.

          1. Not more than 0.002 in. (0.05 mm) in depth.

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

          2. More than in Step.

          1. Reject.

      5. Examine the slots at Zone C.

        Zone C

        -

        The blade loading and blade locking slot(s) and an area around it, on all surfaces of the dovetail, 0.040 in. (1.00 mm) away from the edges of the slot(s).

        1. Galled or fretted.

          1. Not more than 0.002 in. (0.05 mm) in depth.

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

          2. More than in Step.

          1. Reject.

        2. Scored, nicked or dented.

          1. Not more than 0.0010 in. (0.025 mm) in depth.

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

          2. More than in Step.

          1. Reject.

      6. Examine the slots at Zone D.

        Zone D

        -

        The area between Zone A and B

        1. Scored, nicked, dented, galled or fretted.

        1. Reject.

      7. Examine the slots at Zone E.

        Zone E

        -

        The remaining areas of the disk around the dovetail slots that are not in Zones A and C.

        1. Scored, nicked, dented, galled or fretted.

          1. Not more than 0.0050 in. (0.127 mm).

          1. Repair, VRS6136 TASK 72-41-12-300-019 (REPAIR-019).

          2. More than in Step.

          1. Reject.

    10. SUBTASK 72-41-12-220-083 Examine the Rear HPC Disk for Damage on the Ceramic Rub Strips

    1. Refer to Figure.

      2. Examine the disk at Location 1 for damage on the stage 8 ceramic rub strip.

        1. Chipped.

          1. Not more than 10 percent of the total width, a total of 25 percent of the circumference, and 0.0040 in. (0.102 mm) in depth along both edges.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        2. Pitted.

          1. Not more than 0.0250 in. (0.635 mm) in diameter and 0.0040 in. (0.102 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        3. Scratched.

          1. Not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        4. Loose coating or blisters.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        5. Rub track.

          1. Light smearing of coating that is not more than 0.002 in. (0.05 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      3. Examine the disk at Location 2 for damage on the stage 9 ceramic rub strip.

        1. Chipped.

          1. Not more than 10 percent of the total width, a total of 25 percent of the circumference, and 0.0040 in. (0.102 mm) in depth along both edges.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        2. Pitted.

          1. Not more than 0.0250 in. (0.635 mm) in diameter and 0.0040 in. (0.102 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        3. Scratched.

          1. Not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        4. Loose coating or blisters.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        5. Rub track.

          1. Light smearing of coating that is not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      4. Examine the disk at Location 3 for damage on the stage 10 ceramic rub strip.

        1. Chipped.

          1. Not more than 10 percent of the total width, a total of 25 percent of the circumference, and 0.0040 in. (0.102 mm) in depth along both edges.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        2. Pitted.

          1. Not more than 0.0250 in. (0.635 mm) in diameter and 0.0040 in. (0.102 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        3. Scratched.

          1. Not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        4. Loose coating or blisters.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        5. Rub track.

          1. Light smearing of coating that is not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      5. Examine the disk at Location 4 for damage on the stage 11 ceramic rub strip.

        1. Chipped.

          1. Not more than 10 percent of the total width, a total of 25 percent of the circumference, and 0.0040 in. (0.102 mm) in depth along both edges.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        2. Pitted.

          1. Not more than 0.0250 in (0.635 mm) in diameter and 0.0040 in (0.102 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        3. Scratched.

          1. Not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        4. Loose coating or blisters.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

        5. Rub track.

          1. Light smearing of coating that is not more than 0.0020 in. (0.051 mm) in depth.

          1. Accept.

          2. Other than Step.

          1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

    11. SUBTASK 72-41-12-220-084-A00 Examine the Rear HPC Disk (6A7545) for the Diameters (Pre SBE 72-0377)

    1. Refer to Figure.

      2. Examine the disk at Location 1 for the front outside diameter.

        1. If the diameter is between 16.1438 in. and 16.1462 in. (410.053 mm and 410.113 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6134 TASK 72-41-12-300-017 (REPAIR-017).

      3. Examine the disk at Location 2 for the rear outside diameter.

        1. If the diameter is between 13.5080 in. and 13.5090 in. (343.104 mm and 343.129 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6137 TASK 72-41-12-300-020 (REPAIR-020).

      4. Examine the disk at Location 3 for the front inside diameter.

        1. If the diameter is between 12.5100 in. and 12.5120 in (317.754 mm and 317.804 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6135 TASK 72-41-12-300-018 (REPAIR-018).

    12. SUBTASK 72-41-12-220-084-B00 Examine the Rear HPC Disk (6A7574) for the Diameters (SBE 72-0377)

    1. Refer to Figure.

      2. Examine the disk at Location 1 for the front outside diameter.

        1. If the diameter is between 16.1438 in. and 16.1462 in. (410.053 mm and 410.113 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6134 TASK 72-41-12-300-017 (REPAIR-017).

      3. Examine the disk at Location 2 for the rear outside diameter.

        1. If the diameter is between 13.5080 in. and 13.5090 in. (343.104 mm and 343.129 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6137 TASK 72-41-12-300-020 (REPAIR-020).

      4. Examine the disk at Location 3 for the front inside diameter.

        1. If the diameter is between 12.5100 in. and 12.5120 in. (317.754 mm and 317.804 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6135 TASK 72-41-12-300-018 (REPAIR-018).

    13. SUBTASK 72-41-12-220-085 Examine the Rear HPC Disk for the Outside Diameters

    1. CAUTION

      DO NOT USE A PI TAPE TO MEASURE THE DIAMETERS, THE DIAMETERS ARE ON A CONICAL SURFACE.

      Refer to Figure.

      2. Examine the disk at Location 1 for the outside diameter of the stage 8 ceramic rub strip.

        1. If the diameter is between 18.2990 in. and 18.3090 in. (464.795 mm and 465.049 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      3. Examine the disk at Location 2 for the outside diameter of the stage 9 ceramic rub strip.

        1. If the diameter is between 18.5720 in. and 18.5820 in. (471.729 mm and 471.983 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      4. Examine the disk at Location 3 for the outside diameter of the stage 10 ceramic rub strip.

        1. If the diameter is between 18.6180 in. and 18.6280 in. (472.892 mm and 473.151 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

      5. Examine the disk at Location 4 for the outside diameter of the stage 11 ceramic rub strip.

        1. If the diameter is between 18.6240 in. and 18.6340 in. (473.050 mm and 473.304 mm).

        1. Accept.

        2. Other than Step.

        1. Repair, VRS6008 TASK 72-41-12-300-015 (REPAIR-015).

    14. Figure: Rear HPC Disk Inspection Locations -Front Flange Slots

    Rear HPC Disk Inspection Locations -Front Flange Slots

    Figure: Rear HPC Disk Inspection Locations - Rear Bolt Holes

    Rear HPC Disk Inspection Locations - Rear Bolt Holes

    Figure: Rear HPC Disk Inspection Locations

    Rear HPC Disk Inspection Locations

    Figure: Focused Inspection - Blade Loading and Locking Slots Stages 9, 10, 11 and 12

    Focused Inspection - Blade Loading and Locking Slots Stages 9, 10, 11 and 12

    Figure: Rear HPC Disk Inspection Locations

    Rear HPC Disk Inspection Locations

    Figure: Rear HPC Disk Inspection Locations

    Rear HPC Disk Inspection Locations

    Figure: Rear HPC Disk Inspection Locations

    Rear HPC Disk Inspection Locations

    Figure: Focused Inspection - Stages 9, 10, 11 and 12 Disks Bore and Stage 9 Air Transfer Holes (Vent Holes)

    Focused Inspection - Stages 9, 10, 11 and 12 Disks Bore and Stage 9 Air Transfer Holes (Vent Holes)

    Figure: Focused Inspection - Blade Loading and Locking Slots Stages 9, 10, 11 and 12

    Focused Inspection - Blade Loading and Locking Slots Stages 9, 10, 11 and 12

    Figure: Focused Inspection - Front Flange Slots

    Focused Inspection - Front Flange Slots

    Figure: Focused Inspection - Rear Bolt Holes

    Focused Inspection - Rear Bolt Holes

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised steps. (19VG085)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 02-005
Type:sp01
Supply Short Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Supply Name:CoMat 02-005 ADHESIVE TAPE (MASKING)
Specification Groups:
Doc NumberType
OMAT: 2/94 (RR REF)AT 7 BLACK, WATERPROOF
Suppliers:
ManufacturerRemarks
LOCAL
U0415
K6835