TASK 72-50-53-200-102 No. 5 Bearing Pressure Oil Tube - Examine, Inspection-002

DMC:V2500-A0-72-50-5332-00A-310A-C|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 72-50-53-200-102 No. 5 Bearing Pressure Oil Tube - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

20-176

2A2168-01

20-176

2A3091-01

General

This TASK gives the procedure for the inspection of the No.5 bearing pressure tube. For other parts of the exhaust case and fittings, refer to Inspection-000 TASK 72-50-53-200-100.

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 SPM TASK 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to SPM TASK 70-10-00-100-501 or TASK 70-11-55-110-501.

The procedure for those parts which must have a crack test is given in SPM TASK 70-23-00-230-501. 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, SPM TASK 70-02-02-350-501.

Inspection of Parts, SPM TASK 70-20-01-200-501.

Some data on these items is 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

NameManufacturerPart Number / IdentificationQuantityRemark
Flexible video borescopeLOCALFlexible video borescope

(4 mm or 6 mm)

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-50-53-230-064-001 Examine the No. 5 Bearing Pressure Tube (20-176) for Cracks

    1. Clean the part. Refer to Cleaning - 000 TASK 72-50-53-100-100.

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant inspection procedure.

        1. No. 5 bearing pressure tube, Refer to SPM TASK 70-23-01-230-501.

          1. Cracked

          1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    2. SUBTASK 72-50-53-230-064-002 Examine the No. 5 Bearing Pressure Tube (20-176) for Cracks

    1. Clean the part. Refer to Cleaning - 000 TASK 72-50-53-100-100.

      2. Do the test for cracks on the part that is given below. Use the applicable penetrant inspection procedure.

        1. No.5 bearing pressure tube, Refer to SPM TASK 70-23-02-230-501.

          1. Cracked

          1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    3. SUBTASK 72-50-53-220-113 Examine the No. 5 Bearing Pressure Tube (20-176) Heat Shield for Looseness and Dents

    1. Refer to Figure.

      2. Examine the tube heat shield at location 1 for looseness.

        1. If the heat shield is tight at both ends.

        1. Accept

        2. Other than Step.

        1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

      3. Examine the tube heat shield at location 1 for dents.

        1. If the dents do not cause the heat shield to touch the inner tube.

        1. Accept

        2. Other than Step.

        1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    4. SUBTASK 72-50-53-220-114 Examine the No. 5 Bearing Pressure Tube (20-176) for Damage to the Tube Nut Threads

    1. Refer to Figure.

      2. Examine the tube at location 2 for damage to the tube nut threads.

        1. If there is not high metal and the tube thread turns into the mating part freely.

        1. Accept

        2. Other than Step.

        1. Repair, VRS3258 (Repair - 041) TASK 72-50-53-300-041, or For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    5. SUBTASK 72-50-53-220-115 Examine the No. 5 Bearing Pressure Tube (20-176) for Damage

    1. Refer to Figure.

      2. Examine the tube for dents, nicks and scratches.

        1. Dents

          1. Smooth dents not more than 0.025 in. (0.64 mm) in depth.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3258 (Repair - 041) TASK 72-50-53-300-041, or For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

        2. Nicks and scratches.

          1. Not more than 0.005 in. (0.13 mm) in depth with no high metal on the conical seats at locations 3 and 4.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3258 (Repair - 041) TASK 72-50-53-300-041, or For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    6. SUBTASK 72-50-53-220-116 Examine the No. 5 Bearing Pressure Tube (20-176) for Leaks

      1. Examine the tube for leaks by a pressure test with oil.

        1. Leaks at 140 to 160 psig (965.3 to 1103.2 kPa).

        1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    7. SUBTASK 72-50-53-220-230 Examine the Internal Surfaces of the Tube at Location 5 for Coking or Carbon

    1. Refer to Figure.

      2. Examine the internal surfaces of the tube (using a flexible borescope) for coking or carbon at location 5, Refer to Figure.

        1. No coke, carbon or loose particles.

        1. Accept

        2. Carbon or coke.

        1. Clean. Refer to Cleaning - 002 TASK 72-50-53-100-102.

    8. SUBTASK 72-50-53-220-252 Examine the No. 5 Bearing Presssure Tube (20-176) for Wear to the Tube Ferrule

    1. Refer to Figure.

      2. Examine the tube for wear to the ferrule outer diameter at Location 6.

        1. If the wear is 0.010 in. (0.25 mm) or less in depth over 25 percent or less of the surface.

        1. Accept

        2. If the wear is not more than 0.005 in. (0.13 mm) in depth and/or over more than 25 percent of the surface.

        1. Repair, VRS3756 (Repair - 045) TASK 72-50-53-300-045.

        3. Other than Step and Step.

        1. For PN 2A3091-01: Repair, VRS3758 (Repair - 047) TASK 72-50-53-300-047. For PN 2A2168-01: Repair, VRS3757 (Repair - 046) TASK 72-50-53-300-046.

    9. Figure: No. 5 Bearing Pressure Tube Inspection Locations

    No. 5 Bearing Pressure Tube Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Flexible video borescope
Tool Name:Flexible video borescope