TASK 72-42-20-200-115 No. 4 Bearing Compartment Cooling Air Tube Heat Shields - Examine, Inspection-015

DMC:V2500-A0-72-42-2054-00A-310A-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 72-42-20-200-115 No. 4 Bearing Compartment Cooling Air Tube Heat Shields - Examine, Inspection-015

Effectivity

Fig/Item

Part No.

05-240

2A1630

05-260

2A1631

General

This TASK gives the procedure for the inspection of the no.4 bearing tube heat shields. For the other part of the No.4 Bearing Compartment tubes, Refer to Inspection-000 TASK 72-42-20-200-100.

Fig/Item numbers in parentheses in the procedure agree with those used in the IPC.

The policy that is necessary for inspection is given in the SPM TASK 70-20-00-200-501.

All the parts must be cleaned before any part is examined. Refer to the SPM TASK 70-10-00-100-501.

All parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in Step and Step. Do the test before the part is visually examined.

Do not discard any part until you are sure there are no repairs available. Refer to the instructions in repair before a discarded part is used again or oversize parts are installed.

Parts which should be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a later date.

All parts must be examined to make sure that all the repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the task numbers are in the SPM.

References

Refer to the SPM for data on these items.

Definitions of damage, Refer to SPM TASK 70-02-02-350-501.

Inspection of parts, Refer to SPM TASK 70-20-01-200-501.

Some data on these items are contained in this task. For more data on these items refer to the spm:

Method of testing for crack indications.

Chemical processes.

Surface protection.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-20-230-058-001 Examine The No.4 Bearing Tube Heat Shield (05-240, 05-260) For Cracks

    1. Clean the part. Refer to the Cleaning -000 TASK 72-42-20-100-100.

      2. Do The Test For Cracks On The Part That Is Given Below. Use The Applicable Penetrant Procedures. Carefully Examine The Heat Shields.

        1. No.4 Bearing Tube Heat Shields (dip or spray), Refer to SPM TASK 70-23-01-230-501.

          1. Cracked

          1. Reject

    2. SUBTASK 72-42-20-230-058-002 Examine The No.4 Bearing Tube Heat Shields (05-240, 05-260) For Cracks

    1. Clean the part. Refer to the Cleaning -000 TASK 72-42-20-100-100.

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant procedures. Carefully examine the heat shields.

        1. No.4 Bearing Tube Heat Shield (dip or spray), Refer to SPM TASK 70-23-02-230-501.

          1. Cracked

          1. Reject

    3. SUBTASK 72-42-20-220-064 Examine The No. 4 Bearing Tube Heat Shields (05-240, 05-260) For Nicks, Dents And Wear Or Thinning

    1. Refer To Figure and Figure.

      2. Examine the heat shields for nicks and dents.

        1. Nicks

          1. As much as 0.004 in. (0.102 mm) in depth. There must be no high metal in the wire wrap area, location 1.

          1. Accept

          2. Other than Step.

          1. Reject

        2. Dents

          1. As much as 0.025 in. (0.635 mm) in depth. Dents must be smooth and have no crack indications.

          1. Accept

          2. Other than Step.

          1. Reject

      3. Examine the heat shields at location 1 for wear and thickness in the lockwire wrap area.

        1. Wear and thickness.

          1. If the material thickness is a minimum of 0.015 in. (0.381 mm).

          1. Accept

          2. Other than Step.

          1. Reject

    4. Figure: No.4 Bearing Tube Heat Shield (05-240) Inspection Locations

    No.4 Bearing Tube Heat Shield (05-240) Inspection Locations

    Figure: No.4 Bearing Tube Heat Shield (05-260) Inspection Locations

    No.4 Bearing Tube Heat Shield (05-260) Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE