TASK 72-42-32-200-001 No. 4 Bearing Retaining Nut - Examine, Inspection-001

DMC:V2500-A0-72-42-3200-00A-300A-B|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 72-42-32-200-001 No. 4 Bearing Retaining Nut - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-020

2A0064

01-020

2A3956

General

This TASK gives the procedure for the inspection of the bearing retaining nut.

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 procedure must be referred to IAE.

The procedure for those parts which must have a crack test is given in Step. 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 parts must be rejected. Contact IAE for additional information concerning FAA approved repair date.

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 70-20-01-200-501

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 72-42-32-240-051 Examine the Bearing Retaining Nut (01-020) for Cracks

    1. Clean the Part. Refer to TASK 72-42-32-100-000.

      2. Do the test for cracks on the part that is given below. Use the applicable magnetic particle procedure with a copper rod 0.75 in. (19.05 mm) in diameter and 6.00 in. (152.4 mm) in length with 1000 amperage.

        PART IDENT TASK/OP

        Bearing retaining nut

        SUBTASK 70-24-01-240-011

        1. Cracked

        1. Reject

    2. SUBTASK 72-42-32-220-051 Examine the Bearing Retaining Nut (01-020) for Silver Plate on the Threads

    1. Refer to Figure.

      2. Examine the retaining nut for silver plate on the threads at location 2.

        1. Threads must have a minimum of 50 percent silver plate

        1. Accept

        2. Less than (1)

        1. Repair, VRS3079 TASK 72-42-32-300-001 (REPAIR-001)

      3. NOTE

        Silver plate is not mandatory and not completed at location 1.

    3. SUBTASK 72-42-32-220-052 Examine the Bearing Retaining Nut (01-020) for Burrs, Damage and Nicks

    1. Refer to: Figure

      2. Examine the retaining nut threads for burrs, damage and nicks at location 2.

        1. Burred, damaged or nicked

        1. Reject

    4. Figure: Bearing Retaining Nut Inspection Locations

    Bearing Retaining Nut Inspection Locations

Requirements After Job Completion

Follow-On Conditions

NONE