TASK 72-60-28-200-001 Generator Drive Gear Rotating Seal Ring - Examine, Inspection-001

DMC:V2500-A0-72-60-2803-00A-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 72-60-28-200-001 Generator Drive Gear Rotating Seal Ring - Examine, Inspection-001

Effectivity

FIG/ITEM

PART NO.

01-350

7T0457

01-350

7T0477

General

This TASK gives the procedure for the inspection of the IDGS rotating ring. For the other parts of the IDG drive gear assembly, refer to TASK 72-60-28-200-000 (INSPECTION-000).

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 the SPM TASK 70-11-03-300-503.

All the 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 Step. Do the test before the part is visually examined.

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 the 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.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-28-240-054 Do a Crack Test on the IDGS Rotating Ring (01-350) (Magnetic)

    1. Clean the parts. Refer to the TASK 72-60-28-100-000 (CLEANING-000).

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

        PART IDENT PROCEDURE CURRENT/INSPECT TASK/SUBTASK

        Rotating ring

        TB

        500 amps

        TASK

        TASK 70-24-01-240-501

        SUBTASK 70-24-01-240-011

        CF

        300 amps

        Two shots

        TASK 70-24-01-240-501

        90 degrees apart

        SUBTASK 70-24-01-240-010

        1. Cracked

        1. Reject

    2. SUBTASK 72-60-28-220-053 Examine the IDGS Rotation Ring (01-350)

    1. Refer to Figure.

      2. Piloting diameter at location 1.

        1. Diameter.

          1. Between 2.0878 and 2.0886 in. (53.03 and 53.05 mm)

          1. Accept

          2. More than 2.0886 in. (53.05 mm)

          1. Repair, VRS5003 TASK 72-60-28-300-001 (REPAIR-001)

        2. Perpendicularity.

          1. In 0.0005 in. (0.0127 mm) or less in relation to surface A

          1. Accept

          2. More than Step

          1. Repair, VRS5003 TASK 72-60-28-300-001 (REPAIR-001)

      3. Seal surface at location 2.

        1. Flat surface.

          1. In 3 helium lights band or less

          1. Accept

          2. More than Step

          1. Repair, VRS5004 TASK 72-60-28-300-002 (REPAIR-002)

        2. Corrosion, pits and scratches.

          1. The maximum depth of damage is 0.005 in. (0.127 mm). The maximum length of damage is 0.01 in. (0.254 mm)

          1. Accept

          2. More than Step

          1. Repair, VRS5004 TASK 72-60-28-300-002 (REPAIR-002)

    3. Figure: Locations - IDGS rotating ring

    Locations - IDGS rotating ring

Requirements After Job Completion

Follow-On Conditions

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