TASK 72-60-33-200-001 PMA Drive Gear - Examine, Inspection-001

DMC:V2500-A0-72-60-3303-00A-300A-C|Issue No:002.00|Issue Date:2020-05-01

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 72-60-33-200-001 PMA Drive Gear - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-120

4B0286

01-120

4B0293

01-120

4B0361

General

This TASK gives the procedure for the inspection of the PMA drive gear. For the other parts of the PMA drive gear assembly, refer to TASK 72-60-33-200-000 (INSPECTION-000).

Fig/item numbers in parentheses in the procedure agree with those used in the IPC.

The policy 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 the SPM TASK 70-11-03-300-503.

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 the SPM TASK 70-23-00-230-501. 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 repairs have been completed satisfactorily.

The practices and processes referred to in the procedure by the TASK numbers 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 70-20-00-200-501,

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

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment
Magnetizing unitLOCALMagnetizing unit
Demagnetizing unitLOCALDemagnetizing unit
Hardness testerLOCALHardness tester

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-33-240-051 Do a crack test on the PMA Drive Gear (01-120) (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-33-100-000 (CLEANING-000).

      2. Do the test for cracks on the parts that are given below.

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        PMA drive gear

        TB

        450 amps

        SUBTASK 70-24-01-240-011

        Coil

        7000 A/T

        SUBTASK 70-24-01-240-014

        1. Cracked

        1. Reject

    2. SUBTASK 72-60-33-220-051 Examine the PMA Drive Gear (01-120) Gear Teeth at Location 1

    1. Refer to Figure.

      2. Nicks on the tip of the tooth.

        1. Three for each tooth 0.032 in. (0.80 mm) long, 0.008 in. (0.20 mm) in depth, extended less than 0.016 in. (0.40 mm) onto face of tooth. The distance between nicks must be equal to, or larger than the length of the longest nick

        1. Accept

        2. More than Step

        1. Repair VRS5174, TASK 72-60-33-300-001 (REPAIR-001)

      3. Damage on the engagement surface.

        1. Superficial damages

        1. Repair VRS5174, TASK 72-60-33-300-001 (REPAIR-001)

      4. Chips, flakes or fretting

      1. Reject

      5. Wear of teeth.

        1. Measure the dimension over the diametrically opposite 0.1181 in. (3.000 mm) diameter pins

          1. Between 1.1112 and 1.1054 in. (28.225 and 28.078 mm)

          1. Accept

          2. Less than 1.1054 in. (28.078 mm)

          1. Reject

      6. NOTE

        Do this check only if overheating or some other condition makes it necessary. A blue discoloration of the part is an indication of overheating.

        Hardness of teeth.

        1. Measure the hardness of teeth area at location 2

          1. Less than 56 HRC measured at different locations

          1. Reject

    3. SUBTASK 72-60-33-220-052 Examine the PMA Drive Gear (01-120) Inner Diameter at Location 4061

    1. Refer to Figure.

      2. Diameter.

        1. Between 0.4714 and 0.4719 in. (11.974 and 11.986 mm)

        1. Accept

        2. More than 0.4719 in. (11.986 mm)

        1. Repair VRS5175, TASK 72-60-33-300-002 (REPAIR-002)

    4. SUBTASK 72-60-33-220-053 Examine the PMA Drive Gear (01-120) Spline at Location 3

    1. Refer to Figure.

      2. Spline teeth.

        1. Superficial damages

        1. Repair VRS5174, TASK, 72-60-33-300-001 (REPAIR-001)

      3. Chips, flakes or fretting

      1. Reject

      4. Wear of teeth.

        1. Measure the dimension between the diametrically opposite 0.0720 in. (1.829 mm) diameter pins

          1. Between 0.4800 and 0.4825 in. (12.192 and 12.256 mm)

          1. Accept

          2. More than 0.4844 in. (12.304 mm)

          1. Reject

    5. SUBTASK 72-60-33-220-054 Examine the PMA Drive Gear (01-120) Washer Surface at Location 4

    1. Refer to Figure.

      2. Runout.

        1. In 0.0006 in. (0.015 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5176, TASK 72-60-33-300-003 (REPAIR-003)

      3. Fretting

      1. Repair VRS5176, TASK 72-60-33-300-003 (REPAIR-003)

    6. Figure: Locations - PMA Drive Gear

    Locations - PMA Drive Gear

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised effectivity table. (12VF860B)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Demagnetizing unit
Tool Name:Demagnetizing unit
Link not Found
Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment