TASK 72-41-21-300-020 HPC Stage 11 Case And Stage 12 Rotor Path Case - Blend Repair, Repair-020 (VRS6101)

DMC:V2500-A0-72-41-2111-00A-649A-C|Issue No:003.00|Issue Date:2020-08-01

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 72-41-21-300-020 HPC Stage 11 Case And Stage 12 Rotor Path Case - Blend Repair, Repair-020 (VRS6101)

Effectivity

FIG/ITEM

PART NO.

04-600

6A3390

04-600

6A4328

04-600

6A6552

04-600

6B1436

Material of component

PART IDENT

SYMBOL

MATERIAL

HP compressor stage 11 case

QRK or

QTX

Nickel, cobolt steel

General

This repair must only be done when the instruction to do so is given in 72-41-21 Inspection.

NOTE

Equivalent materials or equipment can be used.
More equipment and materials necessary to do this Repair are given in the SPM TASKS given below.
TASK 70-23-05-230-501
TASK 70-35-03-300-501

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all the necessary cleaning and inspection procedures are done before this repair.

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-41-21-350-075 Remove the Damaged Area(s)

    1. Refer to Figure, Figure, Figure and Figure. See Table and Table.

      2. Remove the damage completely.

      1. Refer to the SPM TASK 70-35-03-300-501.

      2. The diameter of the repaired area(s) is to be 50 times the depth.

      3. The maximum blend limits are specified for the different parts and areas on Table and Table.

    2. SUBTASK 72-41-21-220-222 Examine the Repaired Area(s)

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

      2. Make a visual inspection of the repaired area(s) and measure the depth of the repaired area(s).

      1. Make sure the maximum depth of the repaired area(s) is not more than 0.005 in. (0.13 mm).

    3. SUBTASK 72-41-21-230-091 Do a Crack Test

      1. Do a fluorescent penetrant inspection of the repaired area(s).

      1. Refer to the SPM TASK 70-23-05-230-501, use a high sensitivity penetrant.

      2. Cracks or indications are not permitted.

    4. SUBTASK 72-41-21-350-196 Identify the Repair

      1. Vibration peen “VRS6101” adjacent to the part number.

      1. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

    5. Table 3. Blend Repair Limits (PNs 6A3390, 6A4328, and 6A6552)

    Location

    Maximum Blend Depth

    1

    (Rear Flange Faces)

    0.005 in. (0.13 mm)

    2

    (Front Flange Faces)

    0.005 in. (0.13 mm)

    3 and 4

    (Boltholes)

    Burring: Make smooth to adjacent areas.

    Scoring: 0.005 in. (0.13 mm)

    5 and 6

    (Dowel Holes)

    Burring: 0.005 in. (0.13 mm)

    7 and 8

    (Shank Nut)

    Not repairable by blending

    9

    (Borescope Access Hole)

    Burring: Make smooth to adjacent areas.

    Scratches: 0.005 in. (0.13 mm)

    10

    (Figure, for PN 6A6552 only)

    (Ring Face/Seal Mating Face)

    Not repairable by blending

    1055

    (Figure, for PN 6A6552 only)

    (Lining)

    Not repairable by blending

    1141

    (Figure, for PN 6A6552 only)

    (Groove)

    Not repairable by blending

    1163

    (Stop Location Hole)

    Burring: 0.005 in. (0.13 mm)

    Face 1165

    (Front Snap Diameter)

    Not repairable by blending

    1183 and 1184

    (Location Dowel)

    Not repairable by blending

    1199

    (Location Dowel Hole)

    Burring: 0.005 in. (0.13 mm)

    Dimension A

    (Figure, for PN 6A6552 only)

    Not repairable by blending

    Remaining surfaces

    0.005 in. (0.13 mm)

    Table 4. Blend Repair Limits (PN 6B1436)

    Location

    Maximum Blend Depth

    1

    (Rear Flange Rear Face)

    0.005 in. (0.13 mm) except for within Diameter 2.

    Minimum post-blend wall thickness: 0.086 in. (2.18 mm).

    Cumulative blend area cannot exceed 10 percent of surface.

    Individual blend area cannot exceed 0.250 sq in. (161.29 sq mm).

    Blends must be separated by a minimum of one blend width.

    2

    (Front Flange Front Face)

    0.005 in. (0.13 mm) except for within Diameter 1.

    Minimum post-blend wall thickness: 0.086 in. (2.18 mm).

    Cumulative blend area cannot exceed 10 percent of surface.

    Individual blend area cannot exceed 0.250 sq in. (161.29 sq mm).

    Blends must be separated by a minimum of one blend width.

    3 and 4

    (Boltholes)

    Scoring: 0.005 in. (0.13 mm)

    Burring: Make smooth to adjacent areas.

    5

    (Dowel Hole)

    Not repairable by blending

    6

    (Borescope Access Hole)

    Not repairable by blending

    7

    (Ring Face/Seal Mating Face)

    Not repairable by blending

    8

    (Front Flange Rear Face)

    0.005 in. (0.13 mm) except for within Diameter 1.

    Minimum post-blend wall thickness: 0.086 in. (2.18 mm).

    9

    (Rear Flange Front Face)

    0.005 in. (0.13 mm) except for within Diameter 2.

    Minimum post-blend wall thickness: 0.086 in. (2.18 mm).

    10

    (Case Wall Inner Surface)

    0.005 in. (0.13 mm)

    Minimum post-blend wall thickness: 0.044 in. (1.12 mm).

    11

    (Case Wall Outer Surface)

    0.005 in. (0.13 mm)

    Minimum post-blend wall thickness: 0.044 in. (1.12 mm).

    12

    (Aft snap diameter to cross key location ring)

    Not repairable by blending

    1055

    (Lining)

    Not repairable by blending

    1141

    (Groove)

    Not repairable by blending

    1163

    (Stop Location Hole)

    Not repairable by blending

    1165

    (Front Snap Diameter)

    Not repairable by blending

    1184

    (Location Dowel)

    Not repairable by blending

    1199

    (Location Pin Hole)

    Not repairable by blending

    Remaining surfaces

    0.005 in. (0.13 mm)

    Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Figure: Stage 12 Rotor Path Case Assembly (PN 6A6552) - Blend Repair Limit Areas

    Stage 12 Rotor Path Case Assembly (PN 6A6552) - Blend Repair Limit Areas

    Figure: Stage 11 Case Assembly (PNs 6A3390 And 6A4328) - Blend Repair Limit Areas

    Stage 11 Case Assembly (PNs 6A3390 And 6A4328) - Blend Repair Limit Areas

    Figure: Stage 12 Rotor Path Case Assembly (PN 6B1436) - Blend Repair Limit Areas

    Stage 12 Rotor Path Case Assembly (PN 6B1436) - Blend Repair Limit Areas

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure in its entirety. (18VG099)