TASK 79-21-41-200-401-B00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear, Inspection-001

DMC:V2500-A0-79-21-4100-00B-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-B00 Oil Pressure Pump/Filter Housing - Related Parts - Examine The Drive Gear, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-080

4P7270

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 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/SUBTASK numbers are in the SPM.

References

Refer to the SPM for data on these items.

Definition 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 Tester0AM53Hardness Tester

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 79-21-41-240-060 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

        1000A

        SUBTASK 70-24-01-240-010.

        Two shots 90 deg apart

        SUBTASK 70-24-01-240-011

        TB

        1300A

        SUBTASK 70-24-01-240-011.

        1. Cracked

        1. Reject

    2. SUBTASK 79-21-41-220-115 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. 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 0.1378 in. (3.500 mm) diameter pins. Measure the dimension over the pins:

          1. Between 3.6914 and 3.6850 in. (93.761 and 93.599 mm).

          1. Accept

          2. Less than 3.6850 in. (93.599 mm).

          1. Reject

    3. SUBTASK 79-21-41-220-116 Examine the Drive Gear (01-080) Teeth Area at Location 2

    1. Refer to Figure.

      2. Hardness of teeth.

      1. 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.

        2. Measure the hardness of teeth.

          1. Less than 56 HRC measured at different locations.

          1. Reject

    4. SUBTASK 79-21-41-220-117 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 79-21-41-220-118 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. Repair, VRS5297 (Repair-027) TASK 79-21-41-300-027.

    6. SUBTASK 79-21-41-220-119 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 0.8654 in. (21.980 mm).

        1. 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:0AM53
Enterprise Name:IAE INTERNATIONAL AERO ENGINES AG
BU Name:NULL
Building:SUITE 400
Street:628 HEBRON AVENUE
City:GLASTONBURY
State:CT
Zip Code:06033
Country:USA
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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