TASK 72-43-30-840-001 No. 4 Bearing Rear Cooling Duct - Rework To Incorporate Features Which Will Let Unwanted Oil Drain From Between The HPT Stage 1 Air Seal And The HPT Stage1 Turbine Hub, Rework-001 - SBE 72-0190

DMC:V2500-A0-72-43-3001-00A-649A-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 72-43-30-840-001 No. 4 Bearing Rear Cooling Duct - Rework To Incorporate Features Which Will Let Unwanted Oil Drain From Between The HPT Stage 1 Air Seal And The HPT Stage1 Turbine Hub, Rework-001 - SBE 72-0190

Effectivity

FIG/ITEM PART NO.

01-010

2A1205-01

General

The practices and procedures 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 72-43-30-350-059 Machine the No. 4 Bearing Rear Cooling Duct

      1. Set up and machine the cooling duct to remove the debris deflector and the lip.

      1. Refer to Figure.

    2. SUBTASK 72-43-30-230-058 Examine the No. 4 Bearing Rear Cooling Duct

      1. Fluorescent penetrant inspect the cooling duct.

      1. Do the procedure given in the SPM TASK 70-23-01-230-501.

        No cracks are permitted.

    3. SUBTASK 72-43-30-350-060 Identify the No. 4 Bearing Rear Cooling Duct

      1. Mark the new part number adjacent to the part number that was there before.

      1. NUMBER BEFORE - 2A1205-01.

        NEW NUMBER - 2A3078-01.

        Refer to Figure. Make a permanent mark by the procedure given in the SPM TASK 70-09-00-400-501.

    4. Figure: Rework of the No. 4 bearing rear cooling duct

    Rework of the No. 4 bearing rear cooling duct

Requirements After Job Completion

Follow-On Conditions

NONE