TASK 72-41-15-200-010-B00 HPC Stage 12 Rotor Blade - Examine, Inspection-010

DMC:V2500-A0-72-41-1512-00B-300A-C|Issue No:009.00|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 72-41-15-200-010-B00 HPC Stage 12 Rotor Blade - Examine, Inspection-010

Effectivity

FIG/ITEM

PART NO.

02-770

6A4729

02-770

6A5947

Deleted

Deleted

02-770

6A8763

02-785

6A4206

02-785

6A5648

Deleted

Deleted

02-785

6A8764

02-800

6A4207C01

Deleted

Deleted

02-800

6A8761

02-815

6A4207C01

Deleted

Deleted

02-815

6A8761

02-817

6A4207C02

Deleted

Deleted

02-817

6A8762

General

This TASK gives the procedure for the inspection of the HP Compressor Stage 12 rotor blades.

Nicks and dents 0.005 in. (0.13 mm) or less are acceptable without limit to the airfoil and gas washed surface of the platforms.

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

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.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part can be shown to be necessary at a subsequent date.

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.

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 Do the crack 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.

All the 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/SUBTASK number are in SPM.

References

Refer to SPM for data on these items:

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

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.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-15-230-060 Examine the Stage 12 Rotor Blades for Cracks

    1. Clean the parts. Refer to TASK 72-41-15-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts that are given below.

        PART IDENT

        TASK/SUBTASK

        Stage 12 Rotor Blades

        1. Leading edge.

          1. Cracked.

          1. Refer to Step.

        2. Airfoil tips.

          1. Cracked.

          1. Refer to Step.

        3. All remaining areas.

          1. Cracked.

          1. Reject.

    2. SUBTASK 72-41-15-220-551 Examine the Stage 12 Rotor Blades Concave and Convex Airfoil Surfaces at Locations 1 and 2

    1. Refer to Figure.

      2. Nicks or dents.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

      3. Eroded.

      1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

      4. Scored.

        1. Along the Airfoil Chord - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch along the airfoil chord.

          1. Accept.

          2. If stylus hesitates or catches on the airfoil chord.

          1. Reject.

        2. Along the span of the airfoil surface.

        1. Reject.

    3. SUBTASK 72-41-15-220-205-001 Examine the Stage 12 Rotor Blades Concave and Convex Airfoil Surface Finish at Locations 1 and 2, Platform at Location 8 and Root Radius at Location 9 (Pre SBE 70-0714 and SBE 70-0726)

    1. Refer to Figure.

      2. Mean surface finish of 16 microinches (0.40 micrometres) or less.

      1. Accept.

      3. Examine the blade root to find if VRS6074 or VRS6150 is completed.

        1. Other than in Step if the repair identification symbol and /2 is engraved adjacent to the part number

        1. Reject.

        2. Other than in Step and Step.

        1. Repair, VRS6074 TASK 72-41-15-300-029 (REPAIR-029) or Repair, VRS6150 TASK 72-41-15-300-040 (REPAIR-040).

    4. SUBTASK 72-41-15-220-205-002 Examine the Stage 12 Rotor Blades Concave and Convex Airfoil Surface Finish at Locations 1 and 2 (SBE 72-0561)

    1. Refer to Figure.

      2. Mean surface finish of 10 microinches (0.25 micrometers) or less.

      1. Accept.

      3. Mean surface finish greater than 10 microinches (0.25 micrometers).

      1. Repair, VRS6150 TASK 72-41-15-300-040 (REPAIR-040).

    5. SUBTASK 72-41-15-220-552 Examine the Stage 12 Rotor Blades Leading Edge at Location 3

    1. Refer to Figure.

      2. Cracked.

      1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

      3. Nicks or dents.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

      4. Eroded.

      1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

    6. SUBTASK 72-41-15-220-553 Examine the Stage 12 Rotor Blades Trailing Edge at Location 4

    1. Refer to Figure.

      2. Nicks or dents.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

      3. Eroded.

      1. Repair, VRS6018 TASK 72-41-15-300-010 (REPAIR-010).

    7. SUBTASK 72-41-15-220-554 Examine the Stage 12 Rotor Blades Tips at Location 1055

    1. Refer to Figure.

      2. Cracked.

      1. Repair, VRS6058 TASK 72-41-15-300-039 (REPAIR-039) or Repair, VRS6534 TASK 72-41-15-300-055 (REPAIR-055).

      3. Rubbed or worn.

        NOTE

        This is an alternative to Step. If measurements taken during limits from disassembly (TASK 72-41-10-040-001-B00 or TASK 72-41-10-040-001-C00) have not been supplied, Step can be skipped.

        1. In the limits of TASK 72-41-10-040-001-B00 (DISASSEMBLY-001) or TASK 72-41-10-040-001-C00 (DISASSEMBLY-001).

        1. Accept.

        2. Identified as too short in TASK 72-41-10-040-001-B00 (DISASSEMBLY-001) or TASK 72-41-10-040-001-C00 (DISASSEMBLY-001).

        1. Repair, VRS6058 TASK 72-41-15-300-039 (REPAIR-039) or Repair, VRS6534 TASK 72-41-15-300-055 (REPAIR-055).

    8. SUBTASK 72-41-15-220-555 Examine the Stage 12 Rotor Blades Dovetail at Location 5 (All Remaining Faces and/or Areas on Dovetail Excluding the Dovetail End Faces and Corners Addressed in Step)

      NOTE

      Damage of any kind is not allowed on the bedding area (also known as the pressure face) of the dovetail.

    1. Refer to Figure.

      2. Scored.

        1. Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch.

          1. Accept.

          2. If stylus hesitates or catches.

          1. Reject.

      3. Galled.

      1. Reject.

      4. Imperfections - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the imperfection does not display sharp edges, raised material, burrs, or a dark bottom.

        1. Accept.

        2. If stylus hesitates or catches, the imperfection displays sharp edges, raised material, burrs, or a dark bottom or the imperfection is located on the bedding area (pressure face).

        1. Reject.

      5. Nicks or dents - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the nick or dent does not display sharp edges, raised material, or burrs.

        1. Accept.

        2. If stylus hesitates or catches, the nick or dent displays sharp edges, raised material, burrs, or the nick or dent is located on the bedding area (pressure face).

        1. Reject.

    9. SUBTASK 72-41-15-220-556 Examine the Stage 12 Rotor Blades Cheeks at Locations 6 and 7

    1. Refer to Figure.

      2. Galled.

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

        1. Accept.

        2. More than in Step.

        1. Reject.

      3. Scored - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch.

        1. Accept.

        2. If stylus hesitates or catches.

        1. Reject.

      4. Imperfections - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the imperfection does not display sharp edges, raised material, burrs, or a dark bottom.

        1. Accept.

        2. If stylus hesitates or catches, the imperfection displays sharp edges, raised material, burrs, or a dark bottom.

        1. Reject.

      5. Nicks or dents - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the nick or dent does not display sharp edges, raised material, or burrs.

        1. Accept.

        2. If stylus hesitates or catches, the nick or dent displays sharp edges, raised material, or burrs.

        1. Reject.

    10. SUBTASK 72-41-15-220-121 Examine the Stage 12 Rotor Blades Platform at Location 8

    1. Refer to Figure.

      2. Nicks or dents.

        1. On top/gas washed face of the platform.

          1. Up to 0.005 in. (0.13 mm) in depth.

          1. Accept.

          2. More than in Step.

          1. Reject.

        2. On the bottom/non-gas washed face of the platform - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch and the nick or dent does not display sharp edges, raised material, or burrs.

          1. Accept.

          2. If stylus hesitates or catches, the nick or dent displays sharp edges, raised material, or burrs.

          1. Reject.

      3. Scored.

        1. On top/gas washed face of the platform - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch on the platform surface.

          1. Accept.

          2. If stylus hesitates or catches on the platform surface.

          1. Reject.

        2. On the bottom/non-gas washed face of the platform - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch on the platform surface and one or more of the following criteria is met.

            One score of any length.

            Two adjacent scores, one of which is less than 0.472 in. (12 mm) in length and the scores are clearly separated.

          1. Accept.

          2. If stylus hesitates or catches on the platform surface or the criteria in Stepis not maintained.

          1. Reject.

      4. Imperfections.

        1. On the bottom/non-gas washed face of the platform - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch and the imperfection does not display sharp edges, raised material, burrs, or a dark bottom.

          1. Accept.

          2. If stylus hesitates or catches, the imperfection displays sharp edges, raised material, burrs, or a dark bottom.

          1. Reject.

    11. SUBTASK 72-41-15-220-434 Examine the Stage 12 Rotor Blades Platform Surface Finish at Location 8 (SBE 72-0561)

    1. Refer to Figure.

      2. Mean surface finish of 16 microinches (0.40 micrometers) or less.

      1. Accept.

      3. Mean surface finish greater than 16 microinches (0.40 micrometers).

      1. Repair, VRS6150 TASK 72-41-15-300-040 (REPAIR-040).

    12. SUBTASK 72-41-15-220-557 Examine the Stage 12 Rotor Blades Root Radius at Location 9

    1. Refer to Figure.

      2. Nicks or dents.

        1. Up to 0.005 in. (0.13 mm) in depth.

        1. Accept.

        2. More than in Step.

        1. Reject.

      3. Scored.

        1. Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

          1. If stylus does not hesitate or catch along the chord.

          1. Accept.

          2. If stylus hesitates or catches on the chord.

          1. Reject.

      4. Imperfections - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the imperfection does not display sharp edges, raised material, burrs, or a dark bottom.

        1. Accept.

        2. If stylus hesitates or catches, the imperfection displays sharp edges, raised material, burrs, or a dark bottom.

        1. Reject.

    13. SUBTASK 72-41-15-220-558 Examine the Stage 12 Rotor Locking Blades Slots at Location 10

    1. Refer to Figure.

      2. Galled.

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

        1. Accept.

        2. More than in Step.

        1. Reject.

    14. SUBTASK 72-41-15-220-559 Examine the Stage 12 Rotor Blades Chordal Checks

    1. Refer to Figure.

      2. Minimum chord at Z1 and Z2 at Location A and B to the value X.

      1. Accept.

      3. Less than value X.

      1. Reject.

    15. SUBTASK 72-41-15-220-463 Examine the Stage 12 Rotor Blades, Length Checks

      NOTE

      This is an alternative to measurements taken during disassembly (TASK 72-41-10-040-001-B00 or TASK 72-41-10-040-001-C00). If Step has been accomplished, Step can be skipped.

    1. Refer to Figure.

    2. Measure the blade length "X".

      3. Between 1.1560 in. and 1.1680 in. (29.362 mm and 29.667 mm).

      1. Accept.

      4. Between 1.1310 in. and 1.1550 in. (28.727 mm and 29.337 mm).

      1. Repair, VRS6058 TASK 72-41-15-300-039 (REPAIR-039) or Repair, VRS6534 TASK 72-41-15-300-055 (REPAIR-055).

      5. Less than the minimum repair limit given in Repair, VRS6058 TASK 72-41-15-300-039 (REPAIR-039) or Repair, VRS6534 TASK 72-41-15-300-055 (REPAIR-055).

      1. Reject.

    16. SUBTASK 72-41-15-220-582 Examine the Stage 12 Rotor Blade, Dovetail End Faces at Location 9 and Corners at Location 10, Location 11, Location 12 and Location 13

    1. Refer to Figure and Figure.

      2. Scored.

        1. Location 9 - end face.

        1. Accept.

        2. Location 10 - margin to bottom face.

          1. More than 0.039 in. (1.00 mm).

          1. Accept.

          2. Less than 0.039 in. (1.00 mm).

          1. Refer to SPM TASK 70-35-03-300-501 to remove score. Repair corner radius equal to adjacent edges which are not repaired.

        3. Location 11 and 12 - margin to dovetail and neck profile.

          1. Equal to or more than 0.039 in. (1.00 mm).

          1. Accept.

          2. Less than 0.039 in. (1.00 mm).

          1. Reject.

        4. Location 13 - under platform fillet radius (0.067 in. plus or minus 0.008 in. (1.70 mm plus or minus 0.20 mm)).

          1. Until the intersection of radius.

          1. Accept.

          2. On radius.

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

            1. Polish to remove score 1x depth. Refer to SPM TASK 70-35-03-300-501. Do not polish into neck edge radius (location 12).

            2. More than in Step.

            1. Reject.

    17. SUBTASK 72-41-15-220-624 Examine the Stage 12 Rotor Blades Front and Rear Lip at Location 19

    1. Refer to Figure.

      2. Scored - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch.

        1. Accept.

        2. If stylus hesitates or catches.

        1. Reject.

      3. Imperfections - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the imperfection does not display sharp edges, raised material, burrs, or a dark bottom.

        1. Accept.

        2. If stylus hesitates or catches, the imperfection displays sharp edges, raised material, burrs, or a dark bottom.

        1. Reject.

      4. Nicks and dents - Inspect with SPM TASK 70-21-00-220-501 with a 0.020 in. (0.50 mm) radius stylus.

        1. If stylus does not hesitate or catch and the nick or dent does not display sharp edges, raised material, or burrs.

        1. Accept.

        2. If stylus hesitates or catches, the nick or dent displays sharp edges, raised material, or burrs.

        1. Reject.

    18. SUBTASK 72-41-15-220-583 Examine the Stage 12 Rotor Blade, Part Marking and Repair Symbol Location at Location 9, Location 14, Location 15, Location 16, Location 17 and Location 18

    1. Refer to Figure and Figure.

      2. Location 9 - dovetail end faces part marking and repair symbol depth.

        1. Not more than 0.006 in. (0.150 mm) in depth.

        1. Accept.

        2. More than 0.006 in. (0.150 mm) in depth.

        1. Reject.

      3. Location 14 - keep away areas on dovetail end faces and platform bottom faces.

        1. More than 0.032 in. (0.800 mm) from the edges and start of the adjacent fillet radius.

        1. Accept.

        2. Less than 0.032 in. (0.800 mm) from the edges and start of the adjacent fillet radius.

        1. Reject.

      4. Location 15 - platform bottom faces part marking and repair symbol depth.

        1. Not more than 0.006 in. (0.150 mm) in depth.

        1. Accept.

        2. More than 0.006 in. (0.150 mm) in depth.

        1. Reject.

      5. Location 16 - part marking(s) or repair symbol(s) location on bottom faces.

      1. Accept.

      6. Location 17 - keep away area on the bottom face edge.

        1. More than 0.039 in. (1.00 mm).

        1. Accept.

        2. Less than 0.039 in. (1.00 mm).

        1. Refer to SPM TASK 70-35-03-300-501 to remove part marking(s) or repair symbol(s). Repair corner radius equal to adjacent edges which are not repaired.

        2. Do the identification marking again, if removed by Step. Refer to SPM TASK 70-09-00-400-501. Use vibration peen method.

        3. Do Step again.

      7. Location 18 - keep away area on the bottom face.

        1. More than 0.039 in. (1.00 mm) from edges.

        1. Accept.

        2. Less than 0.039 in. (1.00 mm) from edges.

        1. Reject.

    19. Figure: Stage 12 Rotor Blades - Inspection Locations And Orientation

    Stage 12 Rotor Blades - Inspection Locations And Orientation

    Figure: Stage 12 Rotor Blades - Chordal Checks

    Stage 12 Rotor Blades - Chordal Checks

    Figure: Stage 12 Rotor Blades - Measure Blade Length "X"

    Stage 12 Rotor Blades - Measure Blade Length "X"

    Figure: Stage 12 Rotor Blade - Dovetail End Faces and Corners

    Stage 12 Rotor Blade - Dovetail End Faces and Corners

    Figure: Stage 12 Rotor Blade - Dovetail End Faces and Corners for Scoring

    Stage 12 Rotor Blade - Dovetail End Faces and Corners for Scoring

    Figure: Stage 12 Rotor Blade - Dovetail End Faces, Bottom Face and Corners for Part Marking and Repair Symbol Location

    Stage 12 Rotor Blade - Dovetail End Faces, Bottom Face and Corners for Part Marking and Repair Symbol Location

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedural steps to add repair reference. (19VG308)

Change Type:

Editorial to add inadvertently removed step. (18VG299)

Change Type:

Revised effectivity table, procedure and figure. (20VG156)