TASK 72-00-40-200-001 HP System Module - Curvic Coupling Bolt - Examine, Inspection-001

DMC:V2500-A0-72-00-4001-00A-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 72-00-40-200-001 HP System Module - Curvic Coupling Bolt - Examine, Inspection-001

Effectivity

FIG/ITEM PART NO.

01-010

BLT5348

General

This TASK gives the procedure for the inspection of the curvic coupling bolt.

Fig/item numbers in parentheses in the procedure agree with those used in the EIPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the EIPC.

All the parts must be cleaned before any part is examined. Refer to TASK 72-00-40-100-000.

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

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 data.

The procedure for the parts which must have a crack test is given in Step. Do the crack test before a part is visually examined.

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 the 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/SUBTASK 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.

Methods 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 72-00-40-230-051 Examine the Curvic Coupling Bolt for Cracks

    1. Clean the part. Refer to TASK 72-00-40-100-000.

      2. Do the test for cracks on the part that is given below:

        PART IDENT

        TASK/SUBTASK

        Curvic coupling bolt

        1. Cracked

        1. Reject

    2. SUBTASK 72-00-40-220-091 Examine the Curvic Coupling Bolt

    1. Refer to Figure.

      2. Examine the bolt length at location 1.

        1. Bent

        1. Reject

      2. Elongation.

        3. Up to 1.455 in. (36.95 mm) in length

        1. Accept

        4. More than in Step

        1. Reject

      3. Examine the head at location 2.

        1. Galled.

          1. Any galls

          1. Reject

      4. Examine the diameter at location 3.

        1. Worn.

          1. If the diameter is between 0.246 and 0.249 in. (6.25 and 6.32 mm)

          1. Accept

          2. Less than 0.246 in. (6.25 mm)

          1. Reject

      5. Examine the shank at location 4.

        1. Galled.

          1. Any galls

          1. Reject

      6. Examine the threads at location 5.

        1. Crossed

        1. Reject

        2. Stripped

        1. Reject

        3. Pick-up

        1. Reject

    3. Figure: Curvic coupling bolt - inspection locations

    Curvic coupling bolt - inspection locations

Requirements After Job Completion

Follow-On Conditions

NONE