TASK 79-21-41-200-402-A00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear Assembly, Inspection-002 - Pre SBE 79-0006

DMC:V2500-A0-79-21-4100-01A-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 79-21-41-200-402-A00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear Assembly, Inspection-002 - Pre SBE 79-0006

Effectivity

FIG/ITEM

PART NO.

01-200

4B7164

General

This TASK gives the procedure for the inspection of the drive gear assembly.

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 parts must be visually examined for damage, corrosion and wear. Any defects that are not identified in the procedure must be referred to IAE.

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
Workshop inspection equipmentLOCALWorkshop inspection equipment
Magnetizing unitLOCALMagnetizing unit
Demagnetizing unitLOCALDemagnetizing unit

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 79-21-41-240-052 Do A Crack Test on the Drive Gear Assembly (01-200) (Magnetic)

    1. Clean the part. Refer to Cleaning-000 TASK 79-21-41-100-400.

      2. Do a test for cracks on the part that is given below. Use the applicable penetrant inspection procedure.

        1. Drive gear assembly, Refer to SPM TASK 70-24-01-240-501.

          1. Cracked

          1. Reject

    2. SUBTASK 79-21-41-220-091 Examine the Drive Gear Assembly (01-200) Tip of Tooth (Reference No 4608)

    1. Refer to Figure.

      2. Damage of tip of tooth.

        1. Remove the sharp edges or high spots which could damage the mating gear teeth surfaces.

        1. Refer to VRS5299 (Repair-029) TASK 79-21-41-300-029.

      3. Diameter

        1. Between 1.6998 and 1.7008 in. (43.175 and 43.200 mm).

        1. Accept

        2. Less than 1.6998 in. (43.175 mm).

        1. Reject

    3. SUBTASK 79-21-41-220-092 Examine the Drive Gear Assembly (01-200) Teeth on the Face Surface at Location 1

    1. Refer to Figure

      2. Scores

        1. Lightly remove raised material. A 32 micro inch (0.8 micrometer) finish is required.

        1. Refer to VRS5299 (Repair-029) TASK 79-21-41-300-029.

        2. Chipping, flaking or fretting

        1. Reject

      3. Damage and obvious sign of wear.

        1. Measure the dimension on the diametrically opposed 0.315 in. (8 mm) diameter pins.

          1. In 1.8770 and 1.8700 in. (47.671 and 47.494 mm)

          1. Accept

          2. Less than 1.8679 in. (47.444 mm)

          1. Reject

    4. SUBTASK 79-21-41-220-093 Examine the Drive Gear Assembly (01-200) Teeth on the End of the Surface at Location 2

    1. Refer to Figure.

      2. Scores

        1. Not discernible with a 0.04 in. (1 mm) radius spherical-end.

        1. Accept

        2. Remove raised material with a fine stone.

        1. Refer to VRS5299 (Repair-029) TASK 79-21-41-300-029.

    5. SUBTASK 79-21-41-220-094 Examine the Drive Gear Assembly (01-200) Rear and Front Journals (Reference No 4610 and 4603)

    1. Refer to Figure.

      2. Scores

        1. Remove raised metal with a fine stone. Scores must have a circumferential direction. A 10 micro inch (0.25 micrometer) finish is required.

        1. Refer to VRS5299 (Repair-029) TASK 79-21-41-300-029.

    6. SUBTASK 79-21-41-220-095 Examine the Drive Gear Assembly (01-200) Front Bush Journal (Reference No 4603)

    1. Refer to Figure.

      2. Diameter

        1. Between 0.8661 and 0.8655 in. (22.000 and 21.985 mm).

        1. Accept

        2. Less than 0.8655 in. (21.985 mm).

        1. Reject

      3. Concentricity

        1. In 0.0004 in. (0.01 mm) in relation to surface A

        1. Accept

        2. More than Step

        1. Reject

    7. SUBTASK 79-21-41-220-096 Examine the Drive Gear Assembly (01-200) Rear Bush Journal (Reference No 4610)

    1. Refer to Figure.

      2. Diameter

        1. Between 0.8661 and 0.8655 in. (22.000 and 21.985 mm).

        1. Accept

        2. Less than 0.8655 in. (21.985 mm).

        1. Reject

    8. Figure: Locations On The Drive Gear Assembly

    Locations On The Drive Gear Assembly

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Demagnetizing unit
Tool Name:Demagnetizing unit
Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment