TASK 75-24-49-200-106-B00 LPT ACC Cooling Air Ducts - Examine The Upper Duct, Inspection-006

DMC:V2500-A0-75-24-4911-00B-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 75-24-49-200-106-B00 LPT ACC Cooling Air Ducts - Examine The Upper Duct, Inspection-006

Effectivity

FIG/ITEM

PART NO.

02-010

3A2380

General

This TASK gives the procedure for the inspection of the cooling air duct assembly.

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 the SPM TASK 70-20-00-200-501.

All the parts must be cleaned before any part is examined. Refer to Cleaning-000 TASK 75-24-49-100-100.

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. 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, Refer to SPM TASK 70-02-02-350-501.

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

Inspection of Parts, Refer to 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

NONE

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 75-24-49-230-094 Examine the Housing of the Cooling Air Duct Assembly (02-010) for cracks

      1. Do the test for cracks.

      1. Fluorescent penetrant examine for cracks. Refer to SPM TASK 70-23-02-230-501.

        NOTE

        For the method to clean the part, refer to SPM TASK 70-11-03-300-503.
        Clean as referred to in Cleaning-003 TASK 75-24-49-100-103.

      2. Cracked in any area.

      1. Repair VRS4398 (Repair-038) TASK 75-24-49-300-038.

    2. SUBTASK 75-24-49-230-095 Examine the Tubes of the Cooling Air Duct Assembly (02-010) for Cracks

      1. Do the test for cracks.

      1. Fluorescent penetrant examine for cracks. Refer to SPM TASK 70-23-02-230-501.

        NOTE

        For the method to clean the part, refer to SPM TASK 70-11-03-300-503.
        Clean as referred to in Cleaning-003 TASK 75-24-49-100-103.

      2. Cracked in any area.

      1. Repair, VRS4398 (Repair-038) TASK 75-24-49-300-038 or Repair, VRS4396 (Repair-036) TASK 75-24-49-300-036.

    3. SUBTASK 75-24-49-220-116 Examine the Cooling Air Duct Assembly (02-010)

    1. Refer to Figure.

      2. Examine the duct housing complete surface, except area 2.

        1. Nicked

          1. Up to 0.005 in. (0.13 mm) depth no raised material.

          1. Accept

          2. Up to 0.006 in. (0.15 mm) depth no raised material.

          1. Repair VRS4397 (Repair-037) TASK 75-24-49-300-037.

          3. More than in Step.

          1. Repair VRS4398 (Repair-038) TASK 75-24-49-300-038.

        2. Dented up to 0.015 in. (0.38 mm) depth.

        1. Accept

      3. Examine the duct tubes complete surface, except area 1.

        1. Nicked

          1. Up to 0.003 in. (0.076 mm) maximum depth no raised material.

          1. Accept

          2. With raised material or up to 0.006 in. (0.15 mm).

          1. Repair VRS4397 (Repair-037) TASK 75-24-49-300-037.

          3. More than in Step or Step.

          1. Repair VRS4396 (Repair-036) TASK 75-24-49-300-036.

        2. Dented

          1. Not deeper than 20 per cent of the inner diameter of the dented tube. Note: Wall thickness of all tubes is 0.020 in. (0.50 mm).

          1. Accept

          2. Other than in Step.

          1. Repair VRS4396 (Repair-036) TASK 75-24-49-300-036.

      4. Examine the duct at area 1.

        1. Wear, 0.005 in. (0.13 mm) depth no raised material.

        1. Accept

        2. Wear, 0.005 in. (0.13 mm) depth, raised material.

        1. Repair VRS4397 (Repair-037) TASK 75-24-49-300-037.

        3. Wear, 0.015 in. (0.38 mm) depth.

        1. Repair VRS4398 (Repair-038) TASK 75-24-49-300-038.

        4. More than in Step.

        1. Repair VRS4396 (Repair-036) TASK 75-24-49-300-036.

      5. Examine the duct at area 2.

        1. Wear, 0.005 in. (0.13 mm) depth, no raised material.

        1. Accept

        2. Raised material.

        1. Repair VRS4397 (Repair-037) TASK 75-24-49-300-037.

        3. More than in Step.

        1. Repair VRS4398 (Repair-038) TASK 75-24-49-300-038.

    4. SUBTASK 75-24-49-220-117 Examine the Duct Assembly Supports

      1. Examine the complete duct assembly supports.

        1. Loose support rivets.

        1. Repair VRS4395 (Repair-035) TASK 75-24-49-300-035.

        2. Loose anchor nut rivets.

        1. Repair VRS4395 (Repair-035) TASK 75-24-49-300-035.

        3. Worn or damaged anchor nuts.

        1. Repair VRS4395 (Repair-035) TASK 75-24-49-300-035.

        4. Bent or cracked supports.

        1. Repair VRS4395 (Repair-035) TASK 75-24-49-300-035.

    5. Figure: Inspection of the Cooling Air Duct Assembly

    Inspection of the Cooling Air Duct Assembly

Requirements After Job Completion

Follow-On Conditions

NONE