TASK 72-60-21-300-041 Main Gearbox Casing - Repair The Deoiler Bearing Bore By Bushing, Repair-041 (VRS5290)

DMC:V2500-A0-72-60-2101-26A-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 72-60-21-300-041 Main Gearbox Casing - Repair The Deoiler Bearing Bore By Bushing, Repair-041 (VRS5290)

Effectivity

FIG/ITEM

PART NO.

02-050

4B0053

02-050

4B0054

02-050

4B0055

02-050

4B0057

02-050

4B0400

02-050

4B0402

02-050

4B0423

Material of component

PART IDENT

IAE

SYMBOL

MATERIAL

Gearbox casing

-

Aluminum alloy

Bushing

-

Wrought aluminum base alloy

General

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

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

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Bushing4L00071

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-21-320-138 Machine the Deoiler Bearing Bore in the Gearbox Casing

    1. Refer to Figure and Figure.

      2. Machine the bore.

        1. The diameter must be between 2.9118 in. to 2.9134 in. (73.960 mm and 74.000 mm) after the removal of the damage.

        1. Deleted.

    2. SUBTASK 72-60-21-220-168 Examine the Gearbox Casing

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

      1. Use a magnifying glass.

    3. SUBTASK 72-60-21-330-123 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 72-60-21-350-167 Install the Bushing

    1. Refer to Figure and Figure.

      2. WARNING

        DO NOT TOUCH THE HOT PARTS WITHOUT PROTECTIVE GLOVES.

        WARNING

        HOT PARTS CAN CAUSE REDDENING AND BLISTERING OF THE SKIN IF THE HANDS ARE NOT PROTECTED.

        WARNING

        IMMERSE THE CONTACTED AREA IN COLD WATER FOR 10 MINUTES IF THE SKIN IS BURNED. GET MEDICAL ATTENTION IF PAIN OR BLISTERING PERSISTS.

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

        1. Use an oven and/or a freezer.

        1. Do not increase the temperature of the housing above 284 deg F (140 deg C).

        2. Do not decrease the temperature of the bushing below minus 58 deg F (minus 50 deg C).

      3. NOTE

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

        Remove the casing 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 machined bore.

        1. Use an arbor press.

        1. Give sufficient back-up support at bushing bore area, to prevent casing distortion when you install the bushing.

    5. Let the parts get the ambient temperature.

    5. SUBTASK 72-60-21-320-139 Machine the Inner Diameters of the Bushing

    1. Refer to Figure and Figure.

      2. Machine the inner diameters of the bushing.

        1. The dimension must be between 2.7553 in. to 2.7561 in. (69.985 mm to 70.004 mm).

        1. Deleted.

        2. Chamfer where necessary.

    6. SUBTASK 72-60-21-330-124 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 72-60-21-350-168 Identify the Repair

    1. Refer to Figure and Figure.

      2. Make a mark VRS5290 adjacent to the part number.

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

    8. Figure: Repair Details And Dimensions

    Sheet 1

    Legend
    Repair Details And Dimensions

    Sheet 1

    Close

    Figure: Repair Details And Dimensions

    Sheet 2

    Legend
    Repair Details And Dimensions

    Sheet 2

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

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

Link not Found
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