TASK 72-42-20-200-113 No. 4 Bearing Compartment Cooling Air Tube - Examine, Inspection-013

DMC:V2500-A0-72-42-2051-00A-310A-C|Issue No:003.00|Issue Date:2021-08-01

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 72-42-20-200-113 No. 4 Bearing Compartment Cooling Air Tube - Examine, Inspection-013

Effectivity

FIG/ITEM

PART NO.

05-020

2A1031-01

05-020

2A3187-01

05-200

2A1044

General

This TASK gives the procedure for the inspection of the No. 4 bearing cooling tube. 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 SPM TASK 70-20-01-200-501.

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, 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
IAE 2P16367 Pressure test adapter0AM53IAE 2P163671 off
IAE 2P16255 Pressure test plug0AM53IAE 2P162551 off

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-20-230-056-002 Examine the No. 4 Bearing Cooling Tubes (05-020) for Cracks

    1. Clean the part. Refer to 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 cooling tube. Refer to SPM TASK 70-23-02-230-501

          1. Cracked

          1. Reject

    2. SUBTASK 72-42-20-220-056 Examine the No. 4 Bearing Cooling Tube (05-020) for Damage and Wear

    1. Refer to Figure.

    2. Examine the tube at locations 1 and 2 for damage and wear.

      3. If there is high metal or wear in the sealing area at location 1 or in the seal ring groove at location 2.

      1. Repair, VRS3643 (Repair-017) TASK 72-42-20-300-017 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

      4. Surface finish

        1. If the surface finish in the sealing area at location 1 is the finish given in Figure, there must be no axial wear grooves.

        1. Accept

        2. Other than Step.

        1. Repair, VRS3643 (Repair-017) TASK 72-42-20-300-017 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

          NOTE

          If VRS3579 is used for repair and the damage present once a diameter at location 1 is 0.540 in. (13.72 mm) then VRS3579 cannot be used and repair must be made with VRS3643.

    3. SUBTASK 72-42-20-220-057 Examine the No. 4 Bearing Cooling Tube (05-020) for Nicks and Dents

      1. Examine the tube for nicks and dents.

        1. Nicks

          1. As much as 0.004 in. (0.10 mm) in depth. No high metal.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3023 (Repair-003) TASK 72-42-20-300-003 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

        2. Dents

          1. As much as 0.025 in. (0.64 mm) in depth. Dents must be smooth and have no crack indications.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3023 (Repair-003) TASK 72-42-20-300-003 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

    4. SUBTASK 72-42-20-220-058 Examine the No. 4 Bearing Cooling Tube (05-020) Heat Shield for Dents, Wear and Looseness

    1. Refer to Figure.

      2. Examine the tube heat shield at location 3 for dents, wear and looseness.

        1. Dents

          1. As much as 0.025 in. (0,64 mm) in depth. Dents must be smooth and have no crack indications.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3022 (Repair-002) TASK 72-42-20-300-002 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

        2. Wear that you can measure

        1. Repair, VRS3022 (Repair-002) TASK 72-42-20-300-002 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

        3. Looseness

        1. Repair, VRS3022 (Repair-002) TASK 72-42-20-300-002 or Repair, VRS3746 (Repair-022) TASK 72-42-20-300-022.

    5. SUBTASK 72-42-20-220-059 Examine the No. 4 Bearing Cooling Tube (05-020) for Damaged Threads on the Nut

    1. Refer to Figure.

    2. Examine the tube at location 4 for damaged threads on the nut.

      3. Damaged threads

      1. Repair, VRS3435 (Repair-006) TASK 72-42-20-300-006.

    6. SUBTASK 72-42-20-220-060 Examine the No. 4 Bearing Cooling Tube (05-020) for Leaks

    1. Install IAE 2P16367 Pressure test adapter 1 off onto the tube connector. Attach standard pressure test equipment to the adapter.

    2. Install IAE 2P16255 Pressure test plug 1 off onto the opposite end of the tube.

      3. Do a hydraulic pressure test with water at 225 to 246 psig (1551.32 to 1696.11 kpa).

        1. Leaks

        1. Reject

    4. Remove the pressure test plug and the pressure test adapter from the ends of the tube.

    7. SUBTASK 72-42-20-220-061 Examine the No. 4 Bearing Cooling Tube (05-200) for Nicks and Dents

    1. Refer to Figure.

      2. Examine the tube at locations 1 and 3 for nicks and dents.

        1. Nicks

          1. As much as 0.005 in. (0.127 mm) in depth. There must be no high metal.

          1. Accept

          2. Other than Step.

          1. Repair, VRS3291 (Repair-005) TASK 72-42-20-300-005.

        2. Dents

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

          1. Accept

          2. Other than Step.

          1. Repair, VRS3291 (Repair-005) TASK 72-42-20-300-005.

    8. SUBTASK 72-42-20-220-062 Examine the No. 4 Bearing Cooling Tube (05-200) for Wear on the Outside Diameters

    1. Refer to Figure.

      2. Examine the tube at location 1 for wear on the outside diameter.

        1. Wear

          1. If the outside diameter is between 0.694 and 0.700 in. (17.63 and 17.80 mm).

          1. Accept

          2. If the outside diameter at the two wear areas in the figure have a maximum depth of 0.030 in. (0.76 mm) for approximately 180 degrees (refer to location 2) and the outside diameter between the wear areas (refer to location 5) must be a minimum width of 0.060 in. (1.52 mm) for 360 degrees.

          1. Accept

          3. Other than Step and Step.

          1. Repair, VRS3576 MECH (Repair-015) TASK 72-42-20-300-015.

        2. Examine the tube at location 3 for wear on the outside diameter

          1. Wear

            1. If the outside diameter is between 0.693 and 0.698 in. (17.60 and 17.73 mm).

            1. Accept

            2. If the outside diameter at the two wear areas in the figure have a maximum depth of 0.030 in. (0.76 mm) for approximately 180 degrees (refer to location 2) and the outside diameter between the wear areas (refer to location 4) must be a minimum width of 0.060 in. (1.52 mm) for 360 degrees.

            1. Accept

            3. Other than Step and Step.

            1. Repair, VRS3576 MECH (Repair-015) TASK 72-42-20-300-015.

    9. SUBTASK 72-42-20-230-056-003 Examine the No. 4 Bearing Cooling Tubes (05-200) for Cracks

    1. Clean the part. Refer to 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.

        1. No. 4 bearing cooling tube. Refer to SPM TASK 70-23-02-230-501.

          1. Cracked.

          1. Reject.

    10. Figure: No. 4 Bearing Cooling Tube Inspection Locations

    No. 4 Bearing Cooling Tube Inspection Locations

    Figure: No. 4 Bearing Cooling Tube Inspection Locations

    No. 4 Bearing Cooling Tube Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised general description step, subtask title, and added subtask. (18VC573)

Manufacturer Code:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:0AM53
Tool Number:IAE 2P16255
Tool Name:IAE 2P16255 Pressure test plug
Manufacturer Code:0AM53
Tool Number:IAE 2P16367
Tool Name:IAE 2P16367 Pressure test adapter