TASK 79-21-42-200-101 Air Cooled Oil Cooler (ACOC) Inlet Duct - Examine, Inspection-001

DMC:V2500-A0-79-21-4201-00A-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 79-21-42-200-101 Air Cooled Oil Cooler (ACOC) Inlet Duct - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-400

5T0056

01-400

5T0059

01-400

5T0060

01-400

5T0061

01-400

5T0067

01-400

5T0170

General

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.

All the parts must be cleaned before they are examined. Refer to Cleaning-000 TASK 79-21-42-100-100.

All the parts must be visually examined for damage, corrosion and wear. Defects that are not identified in the procedure must be referred to IAE.

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.

The practices and processes referred to in the procedure by the TASK number 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.

Procedures for crack tests

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 79-21-42-230-051 Examine the ACOC Inlet Duct (01-400) for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 79-21-42-100-100.

      2. Do the test for cracks on the parts that follow.

        1. Duct assembly (01-400). Refer to SPM TASK 70-23-01-230-501.

          1. Cracked

          1. Reject

    2. SUBTASK 79-21-42-220-051 Examine the ACOC Inlet Duct (01-400) Mating Surface

    1. Refer to Figure and Figure.

      2. Examine the mating surface at location 3.

        1. Nicks, scratches, burrs or tool marks that do not go into surface roughness texture.

        1. Accept

        2. Other than Step.

        1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

      3. Other surfaces

        1. Nicks, scratches, burrs or tool marks that do not go into surface roughness texture.

        1. Accept

        2. Other than Step.

        1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

    3. SUBTASK 79-21-42-220-052 Examine the ACOC Inlet Duct (01-400) Bolt Holes

    1. Refer to Figure and Figure.

      2. Examine the bolt holes at location 1

        1. Nicks, scratches, burrs or tool marks that do not go into surface roughness texture

        1. Accept

        2. Other than Step.

        1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-001.

    4. SUBTASK 79-21-42-220-053 Examine the ACOC Inlet Duct (01-400) Threaded Inserts

    1. Refer to Figure and Figure.

      2. Examine the threaded inserts at location 2.

        1. Visually inspect inserts.

          1. Broken

          1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

          2. Crossed threads.

          1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

          3. Worn excessively.

          1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

          4. Threads that are not there.

          1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

      3. Examine minimum breakaway torque.

        1. This is the minimum torque necessary to initially turn an installed bolt in a insert. Minimum breakaway torque must not be less than 3.5 lbfin. (0.4 Nm).

        1. Accept

        2. Less than in Step.

        1. Repair, VRS1683 (Repair-001) TASK 79-21-42-300-002.

    5. Figure: ACOC Inlet Duct Inspection Locations

    ACOC Inlet Duct Inspection Locations

    ACOC Inlet Duct Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE