TASK 79-22-48-200-102 Gearbox Scavenge Oil Tubes - Examine The Oil Tube Assembly, Inspection-002

DMC:V2500-A0-79-22-4800-01A-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 79-22-48-200-102 Gearbox Scavenge Oil Tubes - Examine The Oil Tube Assembly, Inspection-002

Effectivity

FIG./ITEM

PART NO.

04-100

4B7200

04-100

4B7263

04-100

4B7325

04-100

4B7353

General

This TASK gives the procedure for the inspection of the oil tube assembly. For the other parts of the scavenge oil tubes-gearbox refer to Inspection-000 TASK 79-22-48-200-100.

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 70-11-03-300-503.

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 SPM TASK 70-23-00-230-501. Do the test before the part is visually examined. Limits for cracks are given in the SUBTASK for each part.

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.

Record and Control of the Lives of Parts, SPM TASK 70-05-00-220-501.

Inspection of Parts, SPM TASK 70-20-00-200-501.

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
Workshop Inspection EquipmentLOCALWorkshop Inspection Equipment
Fluorescent Penetrant Inspection EquipmentLOCALFluorescent Penetrant Inspection Equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 79-22-48-230-052 Examine the Oil Tube Assembly (04-100) for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 79-22-48-100-100.

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

        1. Oil Tube Assembly

        1. Refer to SPM TASK 70-23-01-230-501.

          2. Cracked

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

          3. Trough porosity

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

    2. SUBTASK 79-22-48-220-056 Examine the Oil Tube Assembly (04-100) Tube Surface at Location 1

    1. Refer to Figure.

      2. Pitted

        1. Unlimited number of pits 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 pits for each 2.00 in. (50.8 mm) length of tubing; not more than 0.003 in. (0.075 mm) in depth, 0.062 in. (1.57 mm) in length, 0.010 in. (0.25 mm) in width and no other dents within 0.125 in. (3.175 mm).

        1. Accept

        3. Other than in Step or Step.

        1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

      3. Dents

        1. Of large smooth area related to depth, which do not decrease the tube diameter more than 10 percent at any point.

        1. Accept

        2. Of small smooth area, that is up to 0,125 sq in (80 sq mm) if depth is not more than 0.025 in. (0.064 mm).

        1. Accept

        3. More than in Step or Step.

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

      4. Nicked

        1. Any nicks

        1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

      5. Galled

        1. Any galls

        1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

    3. SUBTASK 79-22-48-220-057 Examine the Scavenge Oil Tube Assembly (04-100) End Fitting

    1. Refer to Figure.

      2. Examine the seal surface at location 2.

        1. Nicked, scored, dented

          1. Up to 0.004 in. (0.10 mm) in depth, not extended across the seal surface.

          1. Accept

          2. More than Step.

          1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

      3. Examine the surface at location 3.

        1. Nicked, scored, dented

          1. Up to 0.008 in. (0.20 mm) in depth.

          1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

          2. More than Step.

          1. Repair, VRS5178 (Repair 002) TASK 79-22-48-300-002 or Repair, VRS7001 (Repair 001) TASK 70-35-24-300-501.

    4. Figure: Locations on the Oil Tube Assembly

    Locations on the Oil Tube Assembly

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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