TASK 72-60-43-200-002 Angle Gearbox Driven Bevel Gearshaft - Examine, Inspection-002

DMC:V2500-A0-72-60-4301-00A-300A-C|Issue No:003.00|Issue Date:2018-08-01

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 72-60-43-200-002 Angle Gearbox Driven Bevel Gearshaft - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-420

4P0224

General

This TASK gives the procedure for the inspection of the bevel gearshaft. For the other parts of the driven lay shaft gear assembly refer to TASK 72-60-43-200-000 (INSPECTION/CHECK-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 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 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 70-20-00-200-501.

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
Demagnetizing unitLOCALDemagnetizing unit
Hardness testerLOCALHardness tester
Magnetizing unitLOCALMagnetizing unit
Workshop inspection equipmentLOCALWorkshop inspection equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-43-240-052 Do a Crack Test on the Bevel Gearshaft (01-420) (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-43-100-000 (CLEANING-000).

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

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Bevel gearshaft

        TB

        600 amps

        SPM TASK 70-24-01-240-501, SUBTASK 70-24-01-240-011

        TB

        1600 amps

        SPM TASK 70-24-01-240-501, SUBTASK 70-24-01-240-011

        Coil

        3500 A/T

        SPM TASK 70-24-01-240-501, SUBTASK 70-24-01-240-014

        1. Cracked.

        1. Reject.

    2. SUBTASK 72-60-43-220-055 Examine the Bevel Gearshaft (72-60-43,01-420) Gear Teeth at Location 1

    1. Refer to Figure.

      2. Nicks on the tip of 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 VRS5199, TASK 72-60-43-300-001 (REPAIR-001).

      3. Damage on the contact surface.

        1. Superficial damages.

        1. Repair VRS5199, TASK 72-60-43-300-001 (REPAIR-001).

      4. Chips/Flakes/Fretting.

      1. Reject.

      5. 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 3.

          1. Less than 56 HRC measured at different locations.

          1. Reject.

        2. Measure the hardness of gear area adjacent to teeth at location 4.

          1. Less than 30 HRC measured at different locations.

          1. Reject.

    3. SUBTASK 72-60-43-220-094 Examine the Bevel Gearshaft (72-60-43,01-420) Spline at Location 5

    1. Refer to Figure.

      2. Spline teeth.

        1. Superficial damages.

        1. Repair VRS5199, TASK 72-60-43-300-001 (REPAIR-001).

      3. Chips/Flakes/Fretting.

      1. Reject.

      4. Wear of teeth.

        1. Measure the dimension between the diametrically opposite 0.1181 in. (3.00 mm) diameter pins.

          1. Between 1.8654 in. and 1.8608 in. (47.38 mm and 47.26 mm).

          1. Accept.

          2. Less than 1.8608 in. (47.26 mm).

          1. Reject.

    4. SUBTASK 72-60-43-220-056 Examine the Bevel Gearshaft (01-420) Spline /Thread, Location 6

    1. Refer to Figure.

      2. Spline teeth.

        1. Superficial damages.

        1. Repair VRS5199, TASK 72-60-43-300-001 (REPAIR-001).

        2. Chips, flakes or fretting.

        1. Reject.

      3. Wear of teeth.

        1. Measure the dimension between the diametrically opposite 0.025 in. (0.610 mm) diameter pins.

          1. Between 2.391 in. and 2.392 in. (60.723 mm and 60.772 mm).

          1. Accept.

          2. Less than 2.391 in. (60.723 mm).

          1. Reject.

      4. Spline diameter.

        1. Measure the major diameter of the spline.

          1. Between 2.362 in. and 2.366 in. (60.00 mm and 60.10 mm).

          1. Accept.

          2. Less than 2.362 in. (60.00 mm).

          1. Reject.

      5. Threads.

        1. Damage.

          1. Any amount.

          1. Reject.

    5. SUBTASK 72-60-43-220-057 Examine the Bevel Gearshaft (01-420) Bearing Journals, Location 4066 and Location 4067

    1. Refer to Figure.

      2. Damage on the surface.

        1. Scratches not more than 0.008 in. (0.20 mm) in depth.

        1. Repair VRS5199, TASK 72-60-43-300-001 (REPAIR-001).

        2. Scratches more than 0.008 in. (0.20 mm) in depth.

        1. Repair VRS5200, TASK 72-60-43-300-003 (REPAIR-003) Repair VRS5201, TASK 72-60-43-300-004 (REPAIR-004).

    6. SUBTASK 72-60-43-220-058 Examine the Bevel Gearshaft (01-420) Ball Bearing Journal, Location 4067

    1. Refer to Figure.

      2. Diameter.

        1. Between 2.3915 in. and 2.3910 in. (60.75 mm and 60.73 mm).

        1. Accept.

        2. Less than 2.3910 in. (60.73 mm).

        1. Repair VRS5200, TASK 72-60-43-300-003 (REPAIR-003).

      3. Runout.

        1. Not more than 0.001 in. (0.03 mm) in relation to surfaces A and B.

        1. Accept.

        2. More than Step.

        1. Repair VRS5200, TASK 72-60-43-300-003 (REPAIR-003).

    7. SUBTASK 72-60-43-220-059 Examine the Bevel Gearshaft (01-420) Roller Bearing Journal, Location 4066

    1. Refer to Figure.

      2. Diameter.

        1. Between 2.4055 in. and 2.4050 in. (61.10 mm and 61.087 mm).

        1. Accept.

        2. Less than 2.4050 in. (61.087 mm).

        1. Repair VRS5201, TASK 72-60-43-300-004 (REPAIR-004).

      3. Runout.

        1. Not more than 0.001 in. (0.03 mm) in relation to surfaces A and B.

        1. Accept.

        2. More than Step.

        1. Repair VRS5201, TASK 72-60-43-300-004 (REPAIR-004).

    8. SUBTASK 72-60-43-220-060 Examine the Bevel Gearshaft (01-420) Roller Bearing Shoulder, Location 5

    1. Refer to Figure.

      2. Runout.

        1. Not more than 0.0006 in. (0.02 mm) in relation to surfaces A and B.

        1. Accept.

        2. More than Step.

        1. Repair VRS5202, TASK 72-60-43-300-005 (REPAIR-005).

    9. Figure: Locations - Bevel Gearshaft

    Locations - Bevel Gearshaft

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revise the procedure to incorporate the rear spline inspection information. (17VF815)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Demagnetizing unit
Tool Name:Demagnetizing unit
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Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment