TASK 72-00-43-220-001 No. 4 Bearing And Rear Compartment Assembly - Examine The No. 4 Bearing And Rear Compartment Parts Front Face At Interface K-43, Inspection-001

DMC:V2500-A0-72-00-4300-00A-310A-B|Issue No:001.00|Issue Date:2014-05-01

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 72-00-43-220-001 No. 4 Bearing And Rear Compartment Assembly - Examine The No. 4 Bearing And Rear Compartment Parts Front Face At Interface K-43, Inspection-001

General

The word 'reject' after an interface inspection statement requires that further detailed inspection or repair, as applicable, of the affected area be accomplished using data in the applicable ATA section of the part in question. Contact IAE for FAA approved data if the referenced TASK is not in the manual.

Refer to TASK 72-00-00-200-001 (examine the modular/non-modular interfaces) before you do this TASK.

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

Interface limit definitions

Nick - A small area of local displacement of metal usually caused by contact with another object. There is no distortion to the adjacent metal.

Dent - A surface depression made by contact with another object and can possibly have local distortion of the adjacent metal.

Warp - A local area of metal twisted or damaged from it's original shape. For this applicable function, warps cause metal movement of less than 0.050 in. (0.270 mm).

Distortion - An area (larger than a warp) of metal damaged from its original shape. For this applicable function, distortion can cause metal movement more than 0.50 in. (0.270 mm)

Erosion damage - Indications having a weathered, abraded, or corroded appearance.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-43-220-051 Visually Examine All the No.4 Bearing Compartment Tubes and Tube Heatshields

      1. Nicks or dents up to 0.025 in. (0.635 mm) deep or up to 0.500 in. (12.700 mm) long.

      1. Accept

      2. Scratches up to 0.025 in. (0.635 mm) deep.

      1. Accept

      3. Surface damage more than Step or Step.

      1. Reject

      4. Cracks.

      1. Reject

    2. SUBTASK 72-00-43-220-052 Visually Examine the No.4 Bearing Outer Race at Location 1

    1. Refer to Figure.

      2. Damage or scratches

      1. Reject

    3. SUBTASK 72-00-43-220-053 Visually Examine the No.4 Bearing Carbon Seal at Location 2

    1. Refer to Figure.

      2. If 50 percent or less of the initial surface width has nicks or damage and the total area of damage is 10 percent or less of the initial surface area.

      1. Accept

      3. If a scratch or gouge is less than 0.005 in (0.127 mm) deep and 0.010 in. (0.254 mm) in width.

      1. Accept

      4. Two such scratches or gouges that go across more than 50 percent of the seal face width are permitted. These scratches or gouges must be more than 1.000 in. (25.400 mm) apart circumferentially.

      1. Accept

      5. Scratches or gouges that go across less than 50 percent of the seal face width is permitted. These scratches or gouges must be more than 1.000 in. (25.400 mm) apart circumferentially.

      1. Accept

      6. Other than Step, Step, Step or Step

      1. Reject

    4. SUBTASK 72-00-43-220-054 Visually Examine the No.4 Bearing Carbon Seal Hardface at Location 3

    1. Refer to Figure.

      2. Chips

      1. Reject

      3. Erosion damage

      1. Reject

    5. SUBTASK 72-00-43-220-055 Visually Examine the No.4 Bearing Front Compartment Heatshield at Location 4

    1. Refer to Figure.

      2. Cracks

      1. Reject

      3. Dents

        1. Up to 0.050 in. (1.270 mm) in depth

        1. Accept

        2. Other than Step

        1. Reject

      4. Loose or missing nuts

      1. Reject

    6. Figure: Locations at interface K-43

    Locations at interface K-43

Requirements After Job Completion

Follow-On Conditions

NONE