TASK 72-00-50-200-002 LPT Module - Front Lock Nut - Examine, Inspection-002

DMC:V2500-A0-72-00-5002-00A-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 72-00-50-200-002 LPT Module - Front Lock Nut - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-140

5A0378

General

This TASK gives the procedure for the inspection of the front lock nut. For the other LP turbine module parts, refer to TASK 72-00-50-200-000.

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 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to TASK 72-00-50-100-000.

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. Limits for cracks are given in the SUBTASK for each part.

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

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

NOTE

To identify consumable materials refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDERLOCALCoMat 06-011

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-50-240-052 Examine the Front Lock Nut (01-140) for Cracks

    1. NOTE

      Magnetic particle inspection can be applied without stripping of silver plate from the front lock nut.

      Clean the part. Refer to TASK 72-00-50-100-000.

      2. NOTE

        During magnetic inspection, it is recommended to use CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDER.

        Do the crack test on the part that is given below. Use the applicable magnetic inspection procedure.

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/OP

        Front lock nut

        TB using continuous wet or simultaneous inking with CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDER

        500 amp

        Visually examine nut outside diameter for longitudinal and radial defects. Do a check for doubtful indications using low power magnification. If necessary, examine under white light at 7X to 20X binocular.

        SPM 70-24-01-240-501

        Solenoid continuous wet or simultaneous inking

        6000 A/T

        Do again the magnetisation and inspection along the lock nut axis. Visually examine for circumferential defects. Do a check for doubtful indications using low power magnification. If necessary, examine under white light at 7X to 20X binocular.

        1. Cracked

        1. Reject

    2. SUBTASK 72-00-50-220-122 Examine the Front Lock Nut (01-140) Outside Surface

    1. Refer to Figure.

      2. Examine the outside surface at location 1.

        1. Scored.

          1. Any scores

          1. Repair, VRS1116 TASK 72-00-50-300-002

    3. SUBTASK 72-00-50-220-123 Examine the Front Lock Nut (01-140) Slots

    1. Refer to Figure.

      2. Examine the slots at location 2.

        1. Burred.

          1. Any burrs

          1. Repair, VRS1116 TASK 72-00-50-300-002

        2. Nicked.

          1. Any nicks

          1. Repair, VRS1116 TASK 72-00-50-300-002

        3. Scored.

          1. Any scores

          1. Repair, VRS1116 TASK 72-00-50-300-002

    4. SUBTASK 72-00-50-220-124 Examine the Front Lock Nut (01-140) Mating Surface

    1. Refer to Figure.

      2. Examine the mating surface at location 3.

        1. Galled.

          1. Any galls

          1. Repair, VRS1116 TASK 72-00-50-300-002

        2. Scored.

          1. Any scores

          1. Repair, VRS1116 TASK 72-00-50-300-002

    5. SUBTASK 72-00-50-220-125 Examine the Front Lock Nut (01-140) Thread

    1. Refer to Figure.

      2. Examine the thread at location 4.

        1. Scored.

          1. Any one of the first three threads: Up to 0.005 in. (0.13 mm) in depth and contained within an arc of 90 degrees

          1. Accept

          2. Remaining threads: Up to 0.005 in. (0.13 mm) in depth and contained within an arc of 180 degrees

          1. Accept

          3. More than in Stepor Step

          1. Reject

        2. Pick up.

          1. Any pick up

          1. Repair, VRS1116 TASK 72-00-50-300-002

        3. Silver plate.

          1. Peeled

          1. Repair, VRS1117 TASK 72-00-50-300-003

    6. Figure: Locations on the front lock nut

    Locations on the front lock nut

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X222X
Supply Number:CoMat 06-011
Type:sp01
Supply Short Name:CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDER
Supply Name:CoMat 06-011 MAGNETIC PARTICLES, FLUORESCENT, DRY POWDER
Specification Groups:
Doc NumberType
Where CoMat 06-011 is specified with no suffix, use one of the CoMat 06-011 letter suffix alternative materials.
Suppliers:
ManufacturerRemarks
X222X