TASK 79-21-41-200-402-C00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear Assembly

DMC:V2500-A0-79-21-4100-01C-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-C00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear Assembly

Effectivity

FIG/ITEM

PART NO.

01-200

4B7307

General

This TASK gives the procedure for the inspection of the drive gear assembly. For the other parts of the oil pressure pump/filter housing, refer to Inspection-000 TASK 79-21-41-200-400.

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 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.

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/SUBTASK 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 79-21-41-240-054 Do a Crack Test on the Drive Gear Assembly (01-200) (Magnetic)

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

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

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Drive gear assembly

        CF

        700 A

        SUBTASK 70-24-01-240-010.

        Coil

        7000 A/T

        SUBTASK 70-24-01-240-014.

        1. Cracked

        1. Reject

    2. SUBTASK 79-21-41-220-103 Examine the Drive Gear Assembly (01-200) Tip of Tooth at Location 1

    1. Refer to Figure.

      2. Damage to tip of tooth.

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

        1. Repair, VRS5652 (Repair-033) TASK 79-21-41-300-033.

      3. Diameter

        1. Between 1.7323 and 1.7313 in. (44.000 and 43.975 mm).

        1. Accept

        2. Less than 1.7313 in. (43.975 mm).

        1. Reject

    3. SUBTASK 79-21-41-220-104 Examine the Drive Gear Assembly (01-200) Teeth on the Face Surface at Location 2

    1. Refer to Figure.

      2. Scored

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

        1. Repair, VRS5652 (Repair-033) TASK 79-21-41-300-033.

      3. Chipped, peeled or fretted.

      1. Reject

      4. Damaged and sign of wear.

        1. Position between the teeth, two diametrically opposed 0.315 in. (8 mm) diameter pins and measure the dimension over the pins.

          1. Between 1.8770 and 1.8679 in. (47.671 and 47.444 mm).

          1. Accept

          2. Less than 1.8679 in. (47.444 mm).

          1. Reject

    4. SUBTASK 79-21-41-220-105 Examine the Drive Gear Assembly (01-200) Teeth on the End of the Surface at Location 3

    1. Refer to Figure.

      2. Scored

        1. Cannot be felt with a 0.04 in. (1 mm) radius spherical end.

        1. Accept

        2. Remove lifted material with a fine stone.

        1. Repair, VRS5652 (Repair-033) TASK 79-21-41-300-033.

    5. SUBTASK 79-21-41-220-106 Examine the Drive Gear Assembly (01-200) Rear and Front Journals at Locations 4 And 5

    1. Refer to Figure.

      2. Scored

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

        1. Repair, VRS5652 (Repair-033) TASK 79-21-41-300-033.

    6. SUBTASK 79-21-41-220-107 Examine the Drive Gear Assembly (01-200) Front Bush Journal at Location 5

    1. Refer to Figure.

      2. Diameter

        1. Between 0.8858 and 0.8852 in. (22.500 and 22.485 mm).

        1. Accept

        2. Less than 0.8852 in. (22.485 mm).

        1. Reject

      3. Concentricity

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

        1. Accept

        2. More than in Step.

        1. Reject

    7. SUBTASK 79-21-41-220-108 Examine the Drive Gear Assembly (01-200) Rear Bush Journal at Location 4

    1. Refer to Figure.

      2. Diameter

        1. Between 0.8858 and 0.8852 in. (22.500 and 21.485 mm).

        1. Accept

        2. Less than 0.8852 in. (22.485 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