TASK 75-00-49-200-101 Engine Stage 7 Air Off-Take Air Ducts - Examine, Inspection-001

DMC:V2500-A0-75-00-4901-02A-300A-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 75-00-49-200-101 Engine Stage 7 Air Off-Take Air Ducts - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-100

6A2281

01-100

6A5759

01-250

6A2290

General

Refer to Inspection-000 TASK 75-00-49-200-400 (CMM-MECH) for other related parts.

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 visually examined for damage, corrosion and wear. Defects that are not identified in the procedure must be referred to International Aero Engines AG.

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.

Reference

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 75-00-49-230-051-001 Examine the Engine Air Off-Take Duct for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 75-00-49-100-100.

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

        PART IDENT

        TASK/OP

        Support assemblies (01-100)

        Duct assembly (01-250)

        1. Cracked

        1. Reject

    2. SUBTASK 75-00-49-230-051-002 Examine the Engine Air Off-Take Duct for Cracks

    1. Clean the parts. Refer to Cleaning-000 TASK 75-00-49-100-100.

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

        PART IDENT

        TASK/OP

        Support assemblies (01-100)

        Duct assembly (01-250)

        1. Cracked

        1. Reject

    3. SUBTASK 75-00-49-220-051 Examine the Surfaces of the Ducts

      1. Dented

        1. Less than 0.500 in. (12.7 mm) from welds or flanges

        1. Reject

        2. In areas other than Step , of smooth type and large area related to depth, which does not decrease the duct diameter by more than (ten) percent in one location.

        1. Accept

        3. In areas other than Step, of smooth type and small area, not more than 0.500 sq in. (322.60 sq mm) with a depth not more than 0.075 in. (1.91 mm).

        1. Accept

        4. Limits more than Step and Step.

        1. Reject

    4. SUBTASK 75-00-49-220-052 Examine the Vee Flanges (01-250)

      1. Galled

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Accept

        2. Limits more than Step.

        1. Reject

      2. Scored

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Accept

        2. Limits more than Step.

        1. Reject

      3. Seal ring grooves

        1. Galled

          1. Up to 0.005 in. (0.13 mm) in depth

          1. Accept

          2. Limits more than Step.

          1. Reject

    5. SUBTASK 75-00-49-220-053 Examine the Duct Mount Flanges (01-100)

      1. Galled

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Repair, VRS6117 (Repair-002) TASK 75-00-49-300-002.

        2. Limits more than Step

        1. Reject

      2. Scored

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Repair, VRS6117 (Repair-002) TASK 75-00-49-300-002.

        2. Limits more than Step.

        1. Reject

      3. Bolt holes

        1. Burred

        1. Repair, VRS6117 (Repair-002) TASK 75-00-49-300-002.

    6. SUBTASK 75-00-49-220-054 Examine the Duct Mount Flanged (01-250)

      1. Galled

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Repair, VRS6118 (Repair-003) TASK 75-00-49-300-003.

        2. Limits more than Step.

        1. Reject

      2. Scored

        1. Up to 0.005 in. (0.13 mm) in depth

        1. Repair, VRS6118 (Repair-003) TASK 75-00-49-300-003.

        2. Limits more than Step.

        1. Reject

      3. Bolt holes

        1. Burred

        1. Repair, VRS6118 (Repair-003) TASK 75-00-49-300-003.

      4. Helicoil inserts

        1. Damaged

        1. Repair, VRS6234 (Repair-009) TASK 75-00-49-300-009.

Requirements After Job Completion

Follow-On Conditions

NONE