TASK 72-60-21-300-049 Main Gearbox Casing - Repair The Fuel Pump Housing Seat By Bushing, Repair-049 (VRS5421)

DMC:V2500-A0-72-60-2101-31A-664A-C|Issue No:003.00|Issue Date:2018-08-01

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 72-60-21-300-049 Main Gearbox Casing - Repair The Fuel Pump Housing Seat By Bushing, Repair-049 (VRS5421)

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

DESCRIPTION

RR

SYMBOL

MATERIAL

Accessory gearbox

casing

A357/T61

(AMS4219)

Aluminum alloy

Bushing

-

Stainless steel

General

NOTE

To identify the consumable materials, refer to the PCI.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Workshop inspection equipmentLOCALWorkshop inspection equipment
Grinding machineLOCALGrinding machine
Magnifying glassLOCALMagnifying glass
OvenLOCALOven
FreezerLOCALFreezer
Arbor PressLOCALArbor press
Vibrating Marking PencilLOCALVibrating Marking Pencil

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Bushing4L00381

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-21-320-083 Machine the Housing Bore in the Gearbox Casing

    1. Refer to Figure.

      2. Machine the housing bore.

      1. The diameter of the bore must be between 5.2740 in. and 5.2756 in. (133.960 mm and 134.000 mm) after the removal of the damage.

      2. The concentricity of the bore must be within 0.004 in. (0.10 mm) FIR in relation to diameter A index 1; if diameter A is damaged refer to zone C index 12 or zone F index 15.

      3. Bore surface rough must be 63 micro in. (1.6 micron).

    2. SUBTASK 72-60-21-220-146 Examine the Gearbox Casing

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

      1. Use a magnifying glass.

    3. SUBTASK 72-60-21-330-078 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 72-60-21-350-094 Install the Bushing

    1. Refer to Figure.

    2. Install the bushing to the drift.

      3. 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. IMMEDIATELY GET THE MEDICAL ATTENTION IF PAIN OR BLISTERING PERSISTS.

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

      1. Use an oven and/or a freezer.

      2. Do not increase the temperature of the casing above 284 deg F (140 deg C).

      3. Do not decrease the temperature of the assembled drift and bushing below minus 58 deg F (minus 50 deg C).

        NOTE

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

      4. Remove the casing from the oven and/or the assembled drift and bushing from the freezer.

      1. Use protective gloves.

      5. 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 IAE drift and an arbor press.

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

    6. Let the parts get to the room temperature.

    7. Remove the drift.

    5. SUBTASK 72-60-21-320-084 Machine the Inner Diameter of the Bushing

    1. Refer to Figure.

      2. Machine the inner diameter of the bushing.

      1. The last dimension of the inner diameter must be between 5.1201 in. and 5.1240 in. (130.050 mm and 130.150 mm).

      2. The concentricity of the bore must be within 0.002 in. (0.050 mm) FIR in relation to diameter A index; if diameter A is damaged refer to zone C index 12.

      3. Bore surface rough must be 63 micro in. (1.6 micron).

    6. SUBTASK 72-60-21-330-079 Apply the Chromate Conversion Coating

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

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

    7. SUBTASK 72-60-21-350-095 Record the Repair

      1. Vibroengrave 'VRS5421' adjacent to the part number.

      1. Remove the metal lifted by marking.

    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:

Added PN 4B0423 in effectivity table. (17VF825)

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
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:Oven
Tool Name:Oven
Manufacturer Code:LOCAL
Tool Number:Vibrating Marking Pencil
Tool Name:Vibrating Marking Pencil
Manufacturer Code:LOCAL
Tool Number:Workshop inspection equipment
Tool Name:Workshop inspection equipment