TASK 72-50-53-200-103 No. 5 Bearing Scavenge Oil Tube - Examine, Inspection-003

DMC:V2500-A0-72-50-5333-00A-300A-C|Issue No:003.00|Issue Date:2020-05-01

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 72-50-53-200-103 No. 5 Bearing Scavenge Oil Tube - Examine, Inspection-003

Effectivity

FIG/ITEM

PART NO.

20-435

2A2169-01

20-435

2A3092-01

General

This TASK gives the procedure for the inspection of the No. 5 bearing scavenge 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 or TASK 70-11-55-110-501.

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

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 72-50-53-230-065-001 Examine the No. 5 Bearing Scavenge Tube (20-435) 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 scavenge tube, Refer to SPM TASK 70-23-01-230-501.

          1. Cracked

          1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    2. SUBTASK 72-50-53-230-065-002 Examine the No. 5 Bearing Scavenge Tube (20-435) 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 scavenge tube, Refer to SPM TASK 70-23-02-230-501.

          1. Cracked

          1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    3. SUBTASK 72-50-53-220-117 Examine the No.5 Bearing Scavenge Tube (20-435) Heat Shield for Looseness and Dents

    1. Refer to Figure.

      2. Examine the tube heat shield for looseness.

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

        1. Accept.

        2. Other than Step.

        1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

      3. Examine the tube heat shield for dents.

        1. Round bottom dents with the depth of the dents not more than 0.010 inch (0.254 mm).

        1. Accept.

        2. Other than Step.

        1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    4. SUBTASK 72-50-53-220-118 Examine the No.5 Bearing Scavenge Tube (20-435) 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. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

        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 1 and 2.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3260 (Repair - 042) TASK 72-50-53-300-042, or PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    5. SUBTASK 72-50-53-220-119 Examine the No.5 Bearing Scavenge Tube (20-435) for Damage to the Tube Nut Threads

    1. Refer to Figure.

      2. Examine the tube at location 3 for damage to the tube nut threads.

        1. If there is no high metal and the tube thread turns into the mating part freely.

        1. Accept

        2. Other than Step.

        1. Repair, VRS3260 (Repair - 042) TASK 72-50-53-300-042, or PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    6. SUBTASK 72-50-53-220-211 Examine the No. 5 Bearing Scavenge Tube (20-435) for Wear to the Tube Ferrulè

    1. Refer to Figure.

      2. Examine the tube at location 4 for wear to the ferrule outer diameter.

        1. If the wear is 0.010 inches (0,25 mm) or less over 25 percent or less in depth of the surface.

        1. Accept.

      3. 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, VRS3792 (Repair -048) TASK 72-50-53-300-048.

      4. Other than Step and Step

      1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    7. SUBTASK 72-50-53-220-120 Examine the No. 5 Bearing Scavenge Tube (20-435) for Leaks

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

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

      1. For PN 2A3092-01: Repair, VRS3793 (Repair - 049) TASK 72-50-53-300-049. For PN 2A2169-01: Repair, VRS3794 (Repair - 050)TASK 72-50-53-300-050.

    8. SUBTASK 72-50-53-220-219 Examine the No. 5 Bearing Scavenge Tube (20-435) for Quality Escape Recovery

      1. Examine the tube for quality escape recovery.

        1. If the tube has the manufacturing lot number marking M268050S1 on the tube nut.

        1. Reject

        2. Other than Step.

        1. Accept

    9. SUBTASK 72-50-53-220-231 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 flexible borescope) for coking or carbon.

        1. No coke or carbon.

        1. Accept

        2. Coke or carbon

        1. Refer to Cleaning - 003 TASK 72-50-53-100-103.

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

    No. 5 Bearing Pressure Tube Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the inspection criteria for dents. (19VC186)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Flexible video borescope
Tool Name:Flexible video borescope