TASK 71-73-49-200-101 No. 4 Bearing Compartment Weep Oil Tubes - Examine, Inspection-001

DMC:V2500-A0-71-73-4900-01A-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 71-73-49-200-101 No. 4 Bearing Compartment Weep Oil Tubes - Examine, Inspection-001

Effectivity

FIG./ITEM

PART NO.

01-100

5R8226

01-500

5R8083

01-500

5R8143

01-500

6A5023

01-500

6A6169

General

This TASK gives the procedure for the inspection of the No.4 bearing oil weep tubes. For other No.4 bearing oil weep tube parts refer to Inspection-000 TASK 71-73-49-200-100 and the Component Maintenance - Miscellaneous Mechanical (CMM-MECH-V2500- 1IA) Inspection-000 TASK 71-73-49-200-400.

Fig./item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig./item numbers are used. For the service bulletin alpha variants refer to the IPC.

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

All the parts must be cleaned before they are examined. Refer to Cleaning-000 TASK 71-73-49-100-100.

All the 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 the relevant SUBTASK. Do the crack 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 the 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/SUBTASK numbers are in the SPM.

NOTE

The consumable materials are given in the related SPM TASK.

References

Refer to the SPM for data on these items:

Definitions of Damage - Specified Types of Damage, SPM TASK 70-02-02-350-501.

Inspection Policy and 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:

Methods 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 71-73-49-230-053 Examine the Tubes for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 71-73-49-100-100.

      2. Do the test for cracks on the parts that are given below. Use the applicable penetrant procedure.

        1. Tubes (01-100) and (01-500).

        1. Refer to SPM TASK 70-23-01-300-503.

        2. Cracked.

        1. Reject.

    2. SUBTASK 71-73-49-220-051 Examine the Tube Surfaces (Location 3)

    1. Refer to Figure.

      2. Dented.

        1. Dents in less than 0.25 in. (6.35 mm) from any weld joint.

        1. Reject.

        2. Smooth dents, if they are round bottomed and the depth is less than 0.025 in. (0.63 mm). Where the dent is on the outside of a bend the depth must be less than 0.015 in. (0.38 mm).

        1. Accept.

        3. Dents more than Step.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      3. Nicked.

        1. Nicks that are round bottomed and less than 0.004 in. (0.10 mm) in depth if all burrs are removed.

        1. Accept.

        2. Nicks more than Step.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      4. Fretted.

        1. Fretting up to maximum depth of 0.004 in. (0.10 mm) on the outside surface of a bend and 0.010 in. (0.25 mm) on remaining section of the tube.

        1. Accept.

        2. More than Step.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      5. Scored.

        1. Scores less than 0.004 in. (0.10 mm) in depth.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

        2. More than Step.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

    3. SUBTASK 71-73-49-220-052 Examine the Tube Bores (Location 1)

    1. Refer to Figure.

      2. Clogged.

      1. Remove obstructions using air blast.

    4. SUBTASK 71-73-49-220-053 Examine the Tube Lugs (Location 6)

    1. Refer to Figure.

      2. Distorted.

        1. Slight distortion can be removed, if the original shape is restored and cracks are not caused.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

        2. Distortion more than Step.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      3. Lugs broken or cracked.

      1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      4. Bolt hole edges burred.

      1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

    5. SUBTASK 71-73-49-220-054 Examine the Tube Union Adapters (Location 2)

    1. Refer to Figure.

      2. Threads.

        1. Pick-up.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

        2. Crossed and stripped.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

      3. Sealing face.

        1. Galled.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

    6. SUBTASK 71-73-49-220-055 Examine the Tube Ferrules (Location 4)

    1. Refer to Figure.

      2. Sealing face.

        1. Galled.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

    7. SUBTASK 71-73-49-220-056 Examine the Tube Nuts (Location 5)

    1. Refer to Figure.

      2. Threads.

        1. Pick-up.

        1. Repair, VRS1112 (Repair-001) TASK 71-73-49-300-001.

        2. Crossed and stripped.

        1. Repair, VRS7001 (Repair-001) SPM TASK 70-35-24-300-501.

    8. Figure: No.4 Bearing Oil Weep Tube

    No.4 Bearing Oil Weep Tube

Requirements After Job Completion

Follow-On Conditions

NONE