TASK 72-60-21-300-015 Main Gearbox Casing - Repair The Oil Nozzle Bore By Bushing, Repair-015 (VRS5296)

DMC:V2500-A0-72-60-2101-06A-664A-C|Issue No:004.00|Issue Date:2021-05-01

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 72-60-21-300-015 Main Gearbox Casing - Repair The Oil Nozzle Bore By Bushing, Repair-015 (VRS5296)

Effectivity

FIG/ITEM

PART NO.

02-050

4B0055

02-050

4B0053

02-050

4B0054

02-050

4B0057

02-050

4B0400

02-050

4B0402

02-050

4B0423

Material of component

PART IDENT

SYMBOL

MATERIAL

Casing

-

Aluminum alloy

Bushing

-

Wrought aluminum base alloy

General

NOTE

Consumable materials are given in the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment
Magnifying GlassLOCALMagnifying Glass
OvenLOCALOven
FreezerLOCALFreezer
Arbor PressLOCALArbor press

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
BushingLOCAL4L00541

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-21-320-136 Machine the Oil Nozzle Bore in the Main Gearbox Casing

    1. Refer to Figure and Figure.

      2. Machine the starter housing bore.

        1. The diameter must be between 0.70866 in. to 0.70925 in. (18.000 mm to 18.015 mm) after the removal of the damage.

        1. Deleted.

    2. SUBTASK 72-60-21-220-167 Examine the Gearbox Casing

      1. Inspect the casing for cracks in the area of the bore.

      1. Use a magnifying glass.

    3. SUBTASK 72-60-21-330-121 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined surfaces.

      1. Refer to the SPM TASK 70-38-02-300-503.

    4. SUBTASK 72-60-21-350-161Install the Bushing

    1. Refer to Figure.

      2. WARNING

        DO NOT TOUCH THE HOT PARTS WITHOUT PROTECTIVE GLOVES. HOT PARTS CAN CAUSE REDDENING AND BLISTERING OF THE SKIN IF THE HANDS ARE NOT PROTECTED. IMMERSE THE CONTACTED AREA IN COLD WATER FOR 10 MINUTES IF THE SKIN IS BURNED. IMMEDIATELY GET MEDICAL ATTENTION IF PAIN OR BLISTERING PERSIST.

        Increase the temperature of the casing and/or decrease the bushing.

      1. Use an oven and/or a freezer. Do not increase the temperature of the casing above 284 deg. F (104 deg. C). Do not decrease the temperature of the bushing below -58 deg. F (-50 deg. C).

        NOTE

        The difference in temperature between the parts must be 216 deg. F (120 deg. C).

      3. Remove the housing from the oven and/or the bushing from the freezer.

      1. Use protective gloves.

      4. CAUTION

        INSTALL BUSHING IN MACHINED BORE IMMEDIATELY AFTER REMOVAL FROM FREEZER, OTHERWISE BUSHING CANNOT BE CORRECTLY INSTALLED.

        Install the bushing into the machined bore.

      1. Use, if necessary, an arbor press. Give sufficient back-up support at bushing bore area, to prevent housing distortion when you install the bushing.

    5. Let the parts get the ambient temperature.

    5. SUBTASK 72-60-21-320-137 Machine the Inner Diameter of the Bushing

    1. Refer to Figure.

      2. Machine the inner diameter of the bushing.

        1. The dimension must be between 0.5295 in. to 0.5965 in. (15.050 mm to 15.150 mm). Chamfer where necessary.

        1. Deleted.

    6. SUBTASK 72-60-21-330-122 Apply the Chromate Conversion Coating

      1. Apply the chromate conversion coating to the machined surfaces of the bushing.

      1. Refer to the SPM TASK 70-38-02-300-503.

    7. SUBTASK 72-60-21-350-162 Identify the Repair

    1. Refer to Figure.

      2. Make a mark VRS5296 adjacent to the part number.

      1. Refer to the SPM TASK 70-09-00-400-501, SUBTASK 70-09-400-001.

    8. Figure: Repair Details And Dimensions

    Repair Details And Dimensions

    Figure: Repair Details And Dimensions

    Repair Details And Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Deleted grinding machine from support equipment and procedural steps. (19VF825)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Tool Number:Arbor press
Tool Name:Arbor Press
Manufacturer Code:LOCAL
Tool Number:Freezer
Tool Name:Freezer
Manufacturer Code:LOCAL
Tool Number:Magnifying Glass
Tool Name:Magnifying Glass
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment