TASK 72-41-31-300-022 HPC Front Cases - Blend Repair On The Inner Gas Washed Surface, Repair-022 (VRS6511)

DMC:V2500-A0-72-41-3101-01A-649A-C|Issue No:003.00|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 72-41-31-300-022 HPC Front Cases - Blend Repair On The Inner Gas Washed Surface, Repair-022 (VRS6511)

Effectivity

FIG/ITEM

PART NO.

ASSEMBLY

01-400

6A3462

A

01-400

6A3675

A

01-400

6A4439

B

01-400

6A5470

A

Material of component

PART IDENT

Material

HP Compressor Front Case

Titanium Alloy

General

This repair must only be done when the instruction to do so is given in 72-41-31 Inspection/Check.

The maximum amount of material that can be removed is given in Figure, Figure, Figure and Figure.

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all the 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 72-41-31-220-204 Examine the HP Compressor Front Case, Assembly A

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

      2. Visually examine and measure the dimensions, AE, for damage in the VIGV, stage 3, 4, 5, and 6 VSV recesses.

      1. Refer to limits given in Figure and Figure.

      2. If the damage is in the limits of repair, do Step.

      3. If the damage is more than the limits of repair, reject.

      3. Visually examine and measure the dimensions, AF, for damage on the VIGV, stage 3, 4, 5, and 6 VSV gas washed surface.

      1. Refer to limits given in Figure and Figure.

      2. If the damage is in the limits of repair, do Step.

      3. If the damage is more than the limits of repair, refer to Repair, VRS6629 TASK 72-41-31-300-027 (REPAIR-027).

    2. SUBTASK 72-41-31-220-284 Examine the HP Compressor Front Case, Assembly B

    1. Refer to Figure, Figure and Figure.

      2. Visually examine and measure the dimensions, AE, for damage in the VIGV, stage 3, 4, and 5 VSV recesses.

      1. Refer to limits given in the Figure.

      2. If the damage is in the limits of repair, do Step.

      3. If the damage is more than the limits of repair, reject.

      3. Visually examine and measure the dimensions, AF, for damage on the VIGV, stage 3, 4, and 5 VSV gas washed surface.

      1. Refer to limits given in the Figure.

      2. If the damage is in the limits of repair, do Step.

      3. If the damage is more than the limits of repair, reject.

    3. SUBTASK 72-41-31-220-285 Examine the HP Compressor Front Case Borescope Inspection Ports, Assembly A and Assembly B

      2. Visually examine and measure the dimensions, AI, AJ, AK, and AN for damage at HP compressor front case borescope inspection ports.

      1. Refer to limits given in Figure and Figure.

      2. If the damage is in the limits of repair, do Step.

      3. If the damage is more than the limits of repair, reject.

    4. SUBTASK 72-41-31-350-075 Remove Damage from the HP Compressor Front Case Assembly

      2. Remove area(s) of damage to the limits of the repair.

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

    5. SUBTASK 72-41-31-110-078 Do a Swab Etch

      2. Chemically clean the repaired area(s).

      1. Refer to SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-001.

      3. Swab etch the repaired area(s).

      1. Refer to SPM TASK 70-11-08-300-503, SUBTASK 70-11-08-300-002.

    6. SUBTASK 72-41-31-230-084 Do a Crack Test

      2. Do a penetrant crack test on the repaired area(s) by one of the following methods:

      1. Fluorescent penetrant inspection by SPM TASK 70-23-04-230-501. Cracks are not permitted.

      2. Local fluorescent penetrant inspection by SPM TASK 70-23-05-230-501, ultra high sensitivity. Cracks are not permitted.

    7. SUBTASK 72-41-31-110-126 Chemically Clean

      1. Chemically clean the repaired area(s) to remove fluorescent penetrant.

      1. Refer to SPM TASK 70-11-03-300-503.

    8. SUBTASK 72-41-31-220-205 Examine the Repair to the HP Compressor Front Case Assembly

      2. Visually examine and measure the dimensions AE, AI, AJ, AK, AF, and AN.

      1. Make sure the surface finish is the same as the adjacent material.

      2. Make sure the blended areas are in the permitted limits. Refer to Figure, Figure, Figure and Figure.

      3. Make sure all highspots, sharp edges and/or burrs are removed and the area(s) made smooth.

    9. SUBTASK 72-41-31-350-076 Identify the Repair

      1. Vibration peen VRS6511 adjacent to the part number.

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

    10. Figure: Repair Details and Dimensions - Assembly A

    Repair Details and Dimensions - Assembly A

    Figure: Repair Details and Dimensions - Assembly A

    Repair Details and Dimensions - Assembly A

    Figure: Repair Details and Dimensions - Assembly B

    Repair Details and Dimensions - Assembly B

    Figure: Repair Details and Dimensions - Assembly A and Assembly B

    Repair Details and Dimensions - Assembly A and Assembly B

    Figure: Repair Details and Dimensions - Assembly A and Assembly B

    Repair Details and Dimensions - Assembly A and Assembly B

    Figure: Repair Details and Dimensions - Assembly A

    Repair Details and Dimensions - Assembly A

    Figure: Repair Details and Dimensions - Assembly B

    Repair Details and Dimensions - Assembly B

    Figure: Repair Details and Dimensions - Assembly A and Assembly B

    Repair Details and Dimensions - Assembly A and Assembly B

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the procedure to modify steps and figures. (18VG344)