TASK 72-42-20-840-002 No. 4 Bearing Compartment Tubes - Provide New Diffuser Group Adapters And Tube Assemblies, Rework-002 - SBE 72-0239

DMC:V2500-A0-72-42-2000-00A-933A-C|Issue No:001.00|Issue Date:2013-11-01

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 72-42-20-840-002 No. 4 Bearing Compartment Tubes - Provide New Diffuser Group Adapters And Tube Assemblies, Rework-002 - SBE 72-0239

Effectivity

FIG/ITEM PART NO.

05-020

2A1031-01

05-061

2A1031-02

06-240

2A2766

General

You must do the rework on the stage 1 HPT air seal given in TASK 72-45-00-840-001SBE 72-0240, (REWORK-001) before or at the same time as you do the rework given in this procedure.

The practices and processes referred to in the procedure by the TASK number are in the SPM.

Refer to the indicated Service Bulletin for specific application requirements.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-20-350-063 Machine the 2A1031-01 No. 4 Bearing Outer Cooling Tube Assembly

      1. Set up and machine to open the 0.204 to 0.214 in. (5.18 to 5.44 mm) diameter to 0.221 to 0.231 in. (5.61 to 5.87 mm) diameter.

      1. Refer to Figure and Figure.

    2. Break the sharp edges to 0.003 to 0.015 in. (0.08 to 0.38 mm).

    2. SUBTASK 72-42-20-350-064 Identify the No. 4 Bearing Outer Cooling Tube Assembly with the New Part Number

      1. Make a mark adjacent to the old part number to show the new part number. Use the vibration peen method.

      1. Number before - 2A1031-01.

        New number - 2A3187-01.

        Refer to the SPM TASK 70-09-00-400-501.

    3. SUBTASK 72-42-20-350-065 Machine the 2A1031-02 No. 4 Bearing Outer Cooling Tube Assembly

      NOTE

      This procedure is required for any 2A1031-02 tube which will be used in a 2A3187-01 No. 4 bearing tube assembly as a replacement detail.

      1. Set up and machine to open the 0.204 to 0.214 in. (5.18 to 5.44 mm) diameter to 0.221 to 0.231 in. (5.61 to 5.87 mm) diameter.

      1. Refer to Figure and Figure.

    2. Break the sharp edges to 0.003 to 0.015 in. (0.08 to 0.38 mm).

    4. SUBTASK 72-42-20-350-066 Identify the No 4 Bearing Outer Cooling Tube Assembly with the New Part Number

      1. Make a mark adjacent to the old part number to show the new part number. Use the vibration peen method.

      1. Number before - 2A1031-02.

        New number - 2A3187-02.

        Refer to the SPM TASK 70-09-00-400-501.

    5. SUBTASK 72-42-20-350-067 Machine the 2A2766 Tube to Boss Adapter

      NOTE

      The 2A2766 adapter is the old part for engines that incorporate SBE 72-0148. The 2A1912 adapter is the old part for engines that do not incorporate SBE 72-0148. The 2A1912 adapter cannot be modified and identified as the new part number.

      1. Set up and machine to open the 0.315 to 0.325 in. (8.00 to 8.26 mm) diameter to 0.399 to 0.409 in. (10.13 to 10.39 mm) diameter.

      1. Refer to Figure and Figure.

    2. Break the sharp edges to 0.003 to 0.015 in. (0.08 to 0.038 mm).

    6. SUBTASK 72-42-20-350-068 Identify the Tube to Boss Adapter with the New Part Number

      1. Make a mark adjacent to the old part number to show the new part number. Use the vibration peen method.

      1. Number before 2A2766.

        New number 2A3188.

        Refer to the SPM TASK 70-09-00-400-501.

    7. SUBTASK 72-42-20-440-051 Install the 2A3187-01 No. 4 Bearing Outer Cooling Tube Assembly

      1. Install the new tube assembly.

      1. Refer to V2500-A0-72-42-0000-00A-710A-B (ASSEMBLY).

    8. SUBTASK 72-42-20-440-052 Install the 2A3188 Tube to Boss Adapters

      1. Install the new adapters.

      1. Refer to V2500-A0-72-42-0000-00A-710A-B (ASSEMBLY).

    9. SUBTASK 72-42-20-350-069 Identify the Diffuser and Combustor Group with the New Part Number

      1. Make a mark adjacent to the old part number to show the new part number. Use the vibration peen method.

      1. Number before - 2A4000.

        New number - 2A9000.

        Number before - 2A9000.

        New number - 2A9000-001.

    10. Figure: Location of the tube assembly and adapter

    Location of the tube assembly and adapter

    Figure: Modification of the tube assembly, tube and adapter

    Modification of the tube assembly, tube and adapter

Requirements After Job Completion

Follow-On Conditions

NONE