TASK 72-42-62-200-001 Combustion Chamber Retaining Bolt - Examine, Inspection-001

DMC:V2500-A0-72-42-6200-00A-300A-B|Issue No:003.00|Issue Date:2016-11-01

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 72-42-62-200-001 Combustion Chamber Retaining Bolt - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-040

2A0403

General

This TASK gives the procedure for the inspection of the combustion chamber retaining bolts.

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 the SPM TASK 70-10-00-100-501.

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

The procedure for those parts which must have a crack test is given in SUBTASK 72-42-62-230-051. Do the test before the part is visually examined.

A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.

Do not discard any part until your 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 practice 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, TASK 70-02-02-350-501

Inspection of Parts, 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.

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 72-42-62-330-053 Remove the Silver Plating from Combustion Chamber Retaining Bolts (01-040)

    1. Refer to Figure.

      2. Remove silver plating from Combustion Chamber Retaining Bolts, Location 1.

      1. Refer to repair, VRS3269 TASK 72-42-62-300-002 (REPAIR-002).

    2. SUBTASK 72-42-62-230-051-001 Examine the Combustion Chamber Retaining Bolts (01-040) for Cracks

    1. Clean the part. Refer to TASK 72-42-62-100-000.

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

        PART IDENT

        TASK/OP

        Combustion Chamber Retaining Bolts

        1. Cracked

        1. Reject

    3. SUBTASK 72-42-62-230-051-002 Examine the Combustion Chamber Retaining Bolts (01-040) for Cracks

    1. Clean the part. Refer to TASK 72-42-62-100-000.

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

        PART IDENT

        TASK/OP

        Combustion Chamber Retaining Bolts

        1. Cracked

        1. Reject

    4. SUBTASK 72-42-62-220-051 Examine the Combustion Chamber Retaining Bolts (01-040) for Wear and Chipped Plasma Spray Coating

    1. Refer to Figure.

      2. Examine the combustion chamber retaining bolts, location 2, for wear and chipped plasma spray coating.

        1. Wear.

          1. Not more than 25 percent of plasma spray coating. Base metal must not be damaged and no cracks permitted

          1. Accept

          2. Other than (a)

          1. Repair, VRS3268 TASK 72-42-62-300-001 (REPAIR-001)

        2. Chipped.

          1. Not more than 25 percent of plasma spray coating. Base metal must not be damaged and not cracks permitted

          1. Accept

          2. Other than (a)

          1. Repair, VRS3268 TASK 72-42-62-300-001 (REPAIR-001)

    5. SUBTASK 72-42-62-220-052 Examine the Combustion Chamber Retaining Bolts (01-040) Threads for Damage

    1. Refer to Figure.

      2. Examine the combustion chamber retaining bolts, location 5, for damage to the threads.

        1. Damage

        1. Reject

    6. SUBTASK 72-42-62-220-054 Examine the Combustion Chamber Retaining Bolts (01-040) on the Outer End Diameter

    1. Refer to Figure

      2. Examine the combustion chamber retaining bolts, location 3, on the outer end diameter.

        1. Diameter.

          1. If the diameter is between 0.437 in. and 0.439 in. (11.100 mm and 11.150 mm)

          1. Accept

          2. Other than (a)

          1. Reject

    7. SUBTASK 72-42-62-220-055 Examine the Combustion Chamber Retaining Bolts (01-040) for Bending

    1. Refer to Figure

      NOTE

      Do a check for bent bolts on a non-worn piece of the round bolt at location 4.

      2. Examine the combustion chamber retaining bolts, location 4, for bends.

        1. Bent

        1. Reject

    8. SUBTASK 72-42-62-330-054 Apply Silver Plating to Combustion Chamber Retaining Bolts (01-040)

    1. Refer to Figure.

      2. Apply Silver Plating to Combustion Chamber Retaining Bolts, Location 1.

      1. Refer to repair, VRS3269 TASK 72-42-62-300-002 (REPAIR-002).

    9. Figure: Combustion Chamber Retaining Bolt Inspection Locations

    Combustion Chamber Retaining Bolt Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised the inspection to add procedure to remove silver plate. (14VC254)