TASK 72-60-24-200-002 Input Gearshaft - Examine, Inspection-002

DMC:V2500-A0-72-60-2401-00A-300A-C|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 72-60-24-200-002 Input Gearshaft - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-140

4B0285

01-140

4P0287

General

This TASK gives the procedure for the inspection of the gearshaft. For the other parts of the extension layshaft gear assembly, refer to TASK 72-60-24-200-000 (INSPECTION-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 70-20-01-200-501.

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

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

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-140 TRIANGULAR INDIA STONE, FINE GRITLOCALCoMat 02-140

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-24-240-051 Do a Crack Test on the Gearshaft (01-140) (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-24-100-000 (CLEANING-000).

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

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Gearshaft

        TB

        1200 Amp

        SUBTASK 70-24-01-240-011

        Coil

        7000 A/T

        SUBTASK 70-24-01-240-014

        1. Cracked

        1. Reject

    2. SUBTASK 72-60-24-220-053 Examine the Gearshaft (72-60-24,01-140) 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) on to 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 VRS5139, TASK 72-60-24-300-009 (REPAIR-009)

      3. Damage on the engagement surface.

        1. Superficial damage

        1. Repair VRS5139, TASK 72-60-24-300-009 (REPAIR-009)

      4. Chips, flakes or fretting

      1. Reject

      5. Wear of teeth.

        1. Measure the dimension of the 28 teeth spur gear over the diametrically opposite 0.1969 in. (5.000 mm) diameter pins

          1. Between 3.1120 and 3.1032 in. (79.046 and 78.822 mm)

          1. Accept

          2. Less than 3.1032 in. (78.822 mm)

          1. Reject

        2. Measure the dimension of the 23 teeth spur gear over the diametrically opposite 0.1181 in. (3.000 mm) diameter pins

          1. Between 1.7367 and 1.7301 in. (44.111 and 43.945 mm)

          1. Accept

          2. Less than 1.7301 in. (43.945 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

        2. Measure the hardness of gear area adjacent to teeth at location 7

          1. Less than 30 HRC measured at different locations

          1. Reject

    3. SUBTASK 72-60-24-220-054 Examine the Gearshaft (01-140) Rear Bearing Shoulder, Location 3

    1. Refer to Figure.

      2. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5142, TASK 72-60-24-300-012 (REPAIR-012)

    4. SUBTASK 72-60-24-220-055 Examine the Gearshaft (72-60-24,01-140) Spline at Location 4

    1. Refer to Figure.

      2. Spline.

        1. Superficial damages

        1. Repair VRS5139, TASK 72-60-24-300-009 (REPAIR-009)

    3. Chips, flakes or fretting.

      4. Wear of teeth.

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

          1. Between 1.5750 and 1.5814 in. (40.005 and 40.168 mm)

          1. Accept

          2. More than 1.5814 in. (40.168 mm)

          1. Reject

    5. SUBTASK 72-60-24-220-056 Examine the Gearshaft (72-60-24,01-140) Inner Seat at Location 5

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.9281 and 1.9301 in. (48.975 and 49.025 mm)

        1. Accept

        2. More than 1.9301 in. (49.025 mm) and less than 1.9399 in. (49.275 mm)

        1. Repair VRS5141, TASK 72-60-24-300-011 (REPAIR-011)

      3. Runout.

        1. In 0.002 in. (0.05 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5141, TASK 72-60-24-300-011 (REPAIR-011)

      4. Damage on the surface.

        1. Not more than 0.0019 in. (0.050 mm) in depth

        1. Accept after removal of high metal and sharp edges by blending. Refer to SPM TASK 70-35-03-300-501. Use CoMat 02-140 TRIANGULAR INDIA STONE, FINE GRIT

        2. More than 0.0019 in. (0.050 mm) in depth

        1. Repair VRS5141, TASK 72-60-24-300-011 (REPAIR-011)

    6. SUBTASK 72-60-24-220-057 Examine the Gearshaft (01-140) Rear and Front Bearing Journals, Location 4031 and 4029

    1. Refer to Figure.

      2. Damage on the surface.

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

        1. Repair, VRS5139 TASK 72-60-24-300-009 (REPAIR-009)

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

        1. Repair, VRS5140 TASK 72-60-24-300-010 (REPAIR-010) Repair VRS5144, TASK 72-60-24-300-014 (REPAIR-014)

    7. SUBTASK 72-60-24-220-058 Examine the Gearshaft (01-140) Rear Bearing Journal, Location 4031

    1. Refer to Figure.

      2. Diameter.

        1. Between 2.3648 and 2.3643 in. (60.066 and 60.053 mm)

        1. Accept

        2. Less than 2.3643 in. (60.053 mm)

        1. Repair VRS5140, TASK 72-60-24-300-010 (REPAIR-010)

      3. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5140, TASK 72-60-24-300-010 (REPAIR-010)

    8. SUBTASK 72-60-24-220-059 Examine the Gearshaft (01-140) Front Bearing Shoulder, Location 6

    1. Refer to Figure.

      2. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5143, TASK 72-60-24-300-013 (REPAIR-013)

    9. SUBTASK 72-60-24-220-060 Examine the Gearshaft (01-140) Front Bearing Journal, Location 4029

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.7734 and 1.7730 in. (45.045 and 45.034 mm)

        1. Accept

        2. Less than 1.7730 in. (45.034 mm)

        1. Repair VRS5144, TASK 72-60-24-990-014 (REPAIR-014)

      3. Runout.

        1. In 0.001 in. (0.025 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5144, TASK 72-60-24-300-014 (REPAIR-014)

    10. Figure: Locations - Gearshaft

    Locations - Gearshaft

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Supply Number:CoMat 02-140
Type:sp01
Supply Short Name:CoMat 02-140 TRIANGULAR INDIA STONE, FINE GRIT
Supply Name:CoMat 02-140 TRIANGULAR INDIA STONE, FINE GRIT
Specification Groups:
Doc NumberType
NORTON TRIANGULAR ABRASIVE FILE, FINE INDIA
Suppliers:
ManufacturerRemarks
LOCAL
A2549
K5991
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