TASK 72-44-50-840-002 HPT Stage 1 Cooling (TOBI) Duct - Provide A New HPT Stage 1 Cooling (TOBI) Duct, Rework-002 - SBE 72-0241

DMC:V2500-A0-72-44-5001-01A-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

Pre SBE 72-0241

Common Information

TASK 72-44-50-840-002 HPT Stage 1 Cooling (TOBI) Duct - Provide A New HPT Stage 1 Cooling (TOBI) Duct, Rework-002 - SBE 72-0241

Effectivity

FIG/ITEM

PART NO.

01-010

2A2141-01

General

You must do the rework on the stage 1 HPT blade assembly given in TASK 72-45-14-840-001, SBE 72-0242, REWORK 001 before or at the same time as you do the rework given in this procedure.

You must do the rework on the stage 1 HPT duct segments given in TASK 72-44-60-840-002, SBE 72-0241, REWORK 002 at the same time 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 72-44-50-320-071 Machine the Stage 1 HPT Cooling Duct Assembly (01-010)

      1. Set up and machine 16 holes to 0.213 - 0.223 in. (5.41 - 5.66 mm) diameter.

      1. Refer to Figure, Figure and Figure.

      2. Set up and machine two holes to 0.196 - 0.206 in. (4.98 - 5.23 mm) diameter.

      1. Refer to Figure and Figure.

    2. SUBTASK 72-44-50-350-067 Adjust the Airflow of the Stage 1 HPT Cooling Duct Assembly (01-010)

      1. Do a modification to get the airflow level of 2A3180. Add plug welds as necessary. The required flow parameter is 1.152. The required average is 1.533.

      1. Do the procedure given in TASK 72-44-50-300-010, VRS3177 (REPAIR-010).

    3. SUBTASK 72-44-50-230-055 Examine the Stage 1 HPT Cooling Duct Assembly (01-010)

      1. Fluorescent penetrant inspect the duct.

        1. Refer to the SPM TASK 70-23-03-230-501.

        1. No cracks are permitted.

    4. SUBTASK 72-44-50-350-068 Identify the New Stage 1 HPT Cooling Duct Assembly (01-010)

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

        1. Number before - 2A2141-01.

          New number - 2A3180-01.

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

    5. SUBTASK 72-44-50-350-069 Identify the New Turbine Nozzle Group

      1. When you assemble the new turbine nozzle group (which includes the new stage 1 HPT cooling duct assembly and the new stage 1 HPT duct segments), identify the new turbine nozzle group. Make a mark adjacent to the old part number to show the new part number. Use the vibration peen method.

        1. Number before - 2A4300.

          New number - 2A8600.

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

    6. Figure: Location of the stage 1 HPT cooling duct assembly

    Location of the stage 1 HPT cooling duct assembly

    Figure: Modification of the stage 1 HPT cooling duct assembly

    Modification of the stage 1 HPT cooling duct assembly

    Figure: Modification of the stage 1 HPT cooling duct assembly

    Modification of the stage 1 HPT cooling duct assembly

    Figure: Modification of the stage 1 HPT cooling duct assembly

    Modification of the stage 1 HPT cooling duct assembly

Requirements After Job Completion

Follow-On Conditions

NONE