TASK 72-43-11-840-001 No. 4 Bearing Front Seal Seat - No.4 Bearing Front Seal Seat - Rework The Seal Seat To Incorporate A Revised Surface Finish And Hardface Thickness, Rework-001 - SBE 72-0036

DMC:V2500-A0-72-43-1100-02A-609A-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 72-43-11-840-001 No. 4 Bearing Front Seal Seat - No.4 Bearing Front Seal Seat - Rework The Seal Seat To Incorporate A Revised Surface Finish And Hardface Thickness, Rework-001 - SBE 72-0036

Effectivity

FIG/ITEM PART NO.

01-010

2A0066

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.

The procedure in TASK 72-43-14-840-001 must be incorporated concurrently when you incorporate this TASK.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-43-11-020-051 Remove the No. 4 Bearing Front Seal Seat

      1. Remove the 2A0066 No.4 bearing front seal seat.

      1. Do the procedure given in TASK 72-00-43-020-001.

    2. SUBTASK 72-43-11-320-051 Machine the No. 4 Bearing Front Seal Seat

      1. Set-up and machine the 2A0066 seal seat.

      1. Refer to Figure requirements.

    3. SUBTASK 72-43-11-340-051 Hardface the No. 4 Bearing Front Seal Seat

      1. Hardface the seal seat in the contained area given in View E with chromium carbide coating.

      1. Refer to Figure requirements.

        The coating can be applied by one of the approved companies given in the SPM TASK 70-34-02-340-501.

        Make sure that no overspray goes into the area marked no hardface.

    4. SUBTASK 72-43-11-320-052 Machine the No. 4 Bearing Front Seal Seat Coating

      1. Set-up and machine the seal seat to the dimensions and surface finish requirements.

      1. Refer to Figure requirements.

        Refer to the procedure given in TASK 70-35-09-350-501.

    5. SUBTASK 72-43-11-350-054 Identify the No. 4 Bearing Front Seal Seat

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

      1. NUMBER BEFORE: 2A0066.

        NEW NUMBER: 2A1998.

        Refer to Figure requirements.

        Do the procedure given in TASK 70-09-00-400-501 and use the vibration peen method.

    6. SUBTASK 72-43-11-440-051 Assemble the No. 4 Bearing Front Seal Seat

      1. Install the 2A1998 No. 4 bearing front seal seat (1 off).

      1. Do the procedure given in TASK 72-43-11-440-001.

    7. Figure: Modification of the No.4 bearing front seal seat

    Modification of the No.4 bearing front seal seat

    Figure: Modification of the No.4 bearing front seal seat

    Modification of the No.4 bearing front seal seat

Requirements After Job Completion

Follow-On Conditions

NONE