TASK 72-60-25-200-002-A00 Fuel Pump Drive Gear - Examine, Inspection-002

DMC:V2500-A0-72-60-2501-00A-300A-C|Issue No:002.00|Issue Date:2019-08-01

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 72-60-25-200-002-A00 Fuel Pump Drive Gear - Examine, Inspection-002

Effectivity

FIG/ITEM

PART NO.

01-200

4P0264

General

This TASK gives the procedure for the inspection of the fuel pump drive gear. For the other parts of the fuel pump dive gear assembly, refer to TASK 72-60-25-200-000 (INSPECTION-000).

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

The policy that is necessary for inspection is given in SPM TASK 70-20-01-200-501.

All the parts must be cleaned before any part is examined. Refer to 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 SPM TASK 70-23-00-230-501. Do the test before the part is visually examined. Limits for crack 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 SPM.

References

Refer to 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 SPM:

Method of Testing for Crack Indications,

Chemical Processes,

Surface Protection.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Demagnetizing unitLOCAL
Hardness TesterLOCALHardness Tester
Magnetizing unitLOCAL
Workshop inspection equipmentLOCALWorkshop inspection equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-25-240-051 Do a Crack Test on the Fuel Pump Drive Gear (01-200) (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-25-100-000 (CLEANING-000).

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

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Fuel Pump Drive

        TB

        700 Amp

        Gear

        SUBTASK 70-24-01-240-011

        TB

        1600 Amp

        SUBTASK 70-24-01-240-011

        Coil

        7000 A/T

        SUBTASK 70-24-01-240-014

        1. Cracked

        1. Reject

    2. SUBTASK 72-60-25-220-053 Examine the Fuel Pump Drive Gear (01-200) 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 VRS5145, TASK 72-60-25-300-013 (REPAIR-013)

      3. Damage on the contact surface.

        1. Superficial damages

        1. Repair VRS5145, TASK 72-60-25-300-013 (REPAIR-013)

        2. Chips, flakes or fretting

        1. Reject

      4. Wear of teeth.

        1. Measure the dimension of the 42 teeth spur gear over the diametrically opposite 0.1969 in. (5.000 mm.) diameter pins:

          1. Between 4.5154 and 4.5082 in. (114.691 and 114.509 mm)

          1. Accept

          2. Less than 4.5063 in. (114.459 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 1.7321 in. (44.111 and 43.995 mm)

          1. Accept

          2. Less than 1.7301 in. (43.945 mm)

          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 2.

          1. Less than 56 HRC measured at different locations

          1. Reject

        2. Measure the hardness of gear area adjacent to teeth at location 3.

          1. Less than 30 HRC measured at different locations

          1. Reject

    3. SUBTASK 72-60-25-220-054 Examine the Fuel Pump Drive Gear (01-200) Rear Bearing Shoulder at Location 14

    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 VRS5150, TASK 72-60-25-300-018 (REPAIR-018)

    4. SUBTASK 72-60-25-220-055 Examine the Fuel Pump Drive Gear (01-200) Rotating Ring Journal at Location 4051

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.6535 and 1.6526 in. (42.00 and 41.975 mm)

        1. Accept

        2. Less than 1.6526 in. (41.975 mm)

        1. Repair VRS5149, TASK 72-60-25-300-017 (REPAIR-017)

      3. Runout.

        1. In 0.002 in. (0.050 mm) in relation to surfaces A and B

        1. Accept

        2. More than Step

        1. Repair VRS5149, TASK 72-60-25-300-017 (REPAIR-017)

    5. SUBTASK 72-60-25-220-056 Examine the Fuel Pump Drive Gear (01-200) Spline at Location 5

    1. Refer to Figure.

      2. Spline teeth.

        1. Superficial damage

        1. Repair VRS5145, TASK 72-60-25-300-013 (REPAIR-013)

        2. Chips, flakes or fretting

        1. Reject

      3. Wear of teeth.

        1. Measure the dimension between the diametrically opposite 0.0864 in. (2.194 mm) diameter pins:

          1. Between 1.0789 and 1.0813 in. (27.403 and 27.465 mm)

          1. Accept

          2. More than 1.0833 in. (27.515 mm)

          1. Reject

    6. SUBTASK 72-60-25-220-057 Examine the Fuel Pump Drive Gear (01-200) Rear and Front Bearing Journals at Location 4048 and 4050

    1. Refer to Figure.

      2. Damage on the surface.

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

        1. Repair VRS5145, TASK 72-60-25-300-013 (REPAIR-013)

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

        1. Repair VRS5147, TASK 72-60-25-400-015 (REPAIR-015). Repair VRS5148, TASK 72-60-25-300-016 (REPAIR-016)

    7. SUBTASK 72-60-25-220-058 Examine the Fuel Pump Drive Gear (01-200) Rear Bearing Journal at Location 4048

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.7733 and 1.7727 in. (45.042 and 45.026 mm)

        1. Accept

        2. Less than 1.7727 in. (45.026 mm)

        1. Repair VRS5148, TASK 72-60-25-300-016 (REPAIR-016)

      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 VRS5148, TASK 72-60-25-300-016 (REPAIR-016)

    8. SUBTASK 72-60-25-220-059 Examine the Fuel Pump Drive Gear (01-200) Front Bearing Shoulder at 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 VRS5146, TASK 72-60-25-300-014 (REPAIR-014).

    9. SUBTASK 72-60-25-220-060 Examine the Fuel Pump Drive Gear (01-200) Front Bearing Journal at Location 4050

    1. Refer to Figure.

      2. Diameter.

        1. Between 1.7733 and 1.7727 in. (45.042 and 45.026 mm)

        1. Accept.

        2. Less than 1.7727 in. (45.026 mm).

        1. Repair VRS5147, TASK 72-60-25-300-015 (REPAIR-015).

      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 VRS5147, TASK 72-60-25-300-015 (REPAIR-015).

    10. Figure: Locations - Fuel Pump Drive Gear

    Locations - Fuel Pump Drive Gear

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised procedure and figure to update location references. (18VC622)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Hardness Tester
Tool Name:Hardness Tester
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment
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