TASK 75-22-49-200-101 No. 4 Bearing Scavenge Valve Air Tubes - Examine, Inspection-001

DMC:V2500-A0-75-22-4901-00A-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 75-22-49-200-101 No. 4 Bearing Scavenge Valve Air Tubes - Examine, Inspection-001

Effectivity

FIG./ITEM

PART NO.

05-100

5A8765

05-100

6A5311

05-500

5A8764

05-500

6A6010

06-100

5A9357

06-100

6A6228

06-500

5A9090

07-100

5A9091

General

This TASK gives the procedure for the inspection of the No.4 bearing scavenge valve air tubes. For the other bearing compartment cooling and sealing tubes and parts, refer to Inspection-000 TASK 75-22-49-200-100 and the Component Maintenance Manual - Miscellaneous Mechanical Components (CMM-MECH-V2500-1IA) Inspection-000 TASK 75-22-49-200-400.

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 75-22-49-100-100.

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 a 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 must be discarded can be held although no repair is available. The repair of a discarded part could be shown to be necessary at a subsequent date.

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

Practices and processes referred to in the procedure by the TASK/SUBTASK number 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 75-22-49-230-051 Examine the No.4 Bearing Scavenge Valve Air Tube for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 75-22-49-100-100.

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

        1. Air tube assembly (05-100), (05-500), ((06-100), (06-500) and (07-100). Refer to SPM TASK 70-23-02-230-501.

          1. Cracked.

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

    2. SUBTASK 75-22-49-220-051 Examine the No.4 Bearing Scavenge Valve Air Tube Surface

    1. Refer to Figure.

      2. Examine the tube surface at location 1.

        1. Pitted

          1. Unlimited number of pitts not more than 0.001 in (0.025 mm) in depth, 0.062 in (1.57 mm) in length and 0.010 in (0.25 mm) in width.

          1. Accept

          2. Maximum of three pitts for each 2.00 in (50.80 mm) length of tubing; not more than 0.003 in (0.075 mm) in depth, 0.062 in (1.57 mm) in length and 0.010 in (0.25 mm) in width and no other dents within 0.125 in (3.175 mm).

          1. Accept

          3. More than Step or Step.

          1. Repair, VRS1650, (Repair-001) TASK 75-22-49-300-001 or Repair, VRS7001, (Repair-001) TASK 70-35-24-300-501.

        2. Dented

          1. In area of bend, or within 0.500 in. (12.70 mm) of bend or fitting.

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

          2. In areas other than Step: Of large smooth area if the maximum diameter is ten times the depth and bore is not decreased by more than ten percent at any one point.

          1. Accept

          3. In areas other than Step: Of small smooth area, that is up to 0.124 sq. in (80.0 sq. mm) if depth is not more than 0.025 in. (0.64 mm).

          1. Accept

          4. More than in Step or Step.

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

        3. Nicked

        1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001 or Repair, VRS7001, (Repair-001) TASK 75-22-49-300-001.

        4. Galled

        1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001 or Repair, VRS7001, (Repair-001) TASK 75-22-49-300-001.

    3. SUBTASK 75-22-49-220-052 Examine the No.4 Bearing Scavenge Valve Air Tube Bore

    1. Refer to Figure.

      2. Examine the tube bore at location 2.

        1. Plugged

        1. Clean with dry air blast.

    4. SUBTASK 75-22-49-220-053 Examine the No.4 Bearing Scavenge Valve Air Tube (05-100), (05-500), (06-500) and (07-100) Ferrule

    1. Refer to Figure.

      2. Sealing face.

        1. Galled

        1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001 or Repair, VRS7001, (Repair-001) TASK 75-22-49-300-001.

    5. SUBTASK 75-22-49-220-054 Examine the No.4 Bearing Scavenge Valve Air Tube (05-100), (05-500), (06-500) and (07-100)) Coupling Nut

    1. Refer to Figure.

      2. Examine the coupling nut at location 4.

        1. Threads

          1. Pick-up

          1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001.

          2. Crossed

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

          3. Stripped

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

    6. SUBTASK 75-22-49-220-055 Examine the No.4 Bearing Scavenge Valve Air Tube (05-100), (06-100) and (06-500) Union Adaptor

    1. Refer to Figure.

      2. Examine the union adaptor at location 5.

        1. Threads

          1. Pick-up

          1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001.

          2. Crossed

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

          3. Stripped

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

        2. Sealing face.

          1. Galled

          1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001 or Repair, VRS7001, (Repair-001) TASK 75-22-49-300-001.

        3. Bolt hole.

          1. Burred

          1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001.

    7. SUBTASK 75-22-49-220-056 Examine the No.4 Bearing Scavenge Valve Air Tube (05-100) and (06-100) Lug

    1. Refer to Figure.

      2. Examine the lug at location 6.

        1. Cracked

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

        2. Distorted, small distortion can be removed if crack are not caused.

        1. Repair, VRS1650 (Repair-001) TASK 75-22-49-300-001.

    8. Figure: Locations on the No.4 Bearing Scavenge Valve Air Tube

    Locations on the No.4 Bearing Scavenge Valve Air Tube

Requirements After Job Completion

Follow-On Conditions

NONE