TASK 79-21-41-200-401-A00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear, Inspection-001

DMC:V2500-A0-79-21-4100-00A-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 79-21-41-200-401-A00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear, Inspection-001

Effectivity

FIG./ITEM

PART NO.

01-080

4P7016

General

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

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 70-21-01-220-501.

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.

A ** following repair referenced in this inspection indicates that the repair is not yet published in the current revision of the manual and the part must be rejected. Contact IAE for additional information concerning FAA approved repair date.

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 parts 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 SPP 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
Hardness TesterLOCALHardness Tester

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 79-21-41-240-051 Do a Crack Test on the Drive Gear (01-080) (Magnetic)

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

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

        PART IDENT

        PROCEDURE

        CURRENT/INSPECT

        TASK/SUBTASK

        Drive gear

        CF

        Two shots

        90 deg apart

        1000A

        Refer to SPM TASK 70-21-01-220-501, SUBTASK 70-24-01-240-010.

        TB

        1300A

        Refer to SPM TASK 70-21-01-220-501, SUBTASK 70-24-01-240-011.

        1. Cracked

        1. Reject.

    2. SUBTASK 79-21-41-220-086 Examine the Drive Gear (01-080) Teeth

    1. Refer to Figure.

      2. Nicks on the tip of tooth area at Location 1

        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. Refer to Repair, VRS5297(Repair-027) TASK 79-21-41-300-027.

      3. Nicks external to tip of tooth area

      1. Accept.

      4. Chips, flakes, or fretting

      1. Reject.

      5. Damage and obvious sign of wear

        1. Put between the teeth at diametrically opposed positions, two 0.1181 in. (3.000 mm) diameter pins and measure the dimension over the pins:

          1. In 3.2554 and 3.2505 in. (82.686 and 82.564 mm)

          1. Accept.

          2. Less than 3.2486 in. (82.514 mm)

          1. Reject.

    3. SUBTASK 79-21-41-220-087 Examine the Drive Gear (01-080) Teeth Area at Location 2

    1. Refer to Figure.

      2. Hardness of teeth

        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.

        1. Measure the hardness of teeth

          1. Less than 56 HRC measured at different locations

          1. Reject.

    4. SUBTASK 79-21-41-220-088 Examine the Drive Gear (01-080) Adjacent to Teeth at Location 3

    1. Refer to Figure.

      2. Hardness of teeth

        1. Measure the hardness of teeth

          1. Less than 30 HRC measured at different locations

          1. Reject.

    5. SUBTASK 79-21-41-220-089 Examine the Drive Gear (01-080) Web Surfaces

      1. Nicks, scores, dents or scratches

        1. All quantity, all length not more than 0.008 in. (0.20 mm) in depth

        1. Accept.

        2. More than Step

        1. Refer to Repair, VRS5297(Repair-027) TASK 79-21-41-300-027.

    6. SUBTASK 79-21-41-220-090 Examine the Drive Gear (01-080) Mating Seat Drive Gear (Reference No.4600)

    1. Refer to Figure.

      2. Diameter

        1. Between 0.8648 and 0.8654 in. (21.965 and 21.980 mm)

        1. Accept.

        2. More than Step

        1. Refer to Repair, VRS5298(Repair-028) TASK 79-21-41-300-028.

    7. Figure: Locations On The Drive Gear

    Locations On The Drive Gear

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:Hardness Tester
Tool Name:Hardness Tester
Manufacturer Code:LOCAL
Tool Number:Magnetizing unit
Tool Name:Magnetizing unit
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment