TASK 72-60-21-300-058 Main Gearbox Casing - Repair The Oil Scavenge Tube Bore By Bushing, Repair-058 (VRS5710)

DMC:V2500-A0-72-60-2101-39A-664A-C|Issue No:001.00|Issue Date:2020-02-01

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 72-60-21-300-058 Main Gearbox Casing - Repair The Oil Scavenge Tube Bore By Bushing, Repair-058 (VRS5710)

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

Casing, Main Gearbox

A357/T61 (AMS4219)

Aluminum alloy

Bushing

A357-T61 Spec. AMS4219, or AMS 4120 (type 2024 T4fT351), or AMS4152

Aluminum alloy

General

Price and availability - None

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
FPI EquipmentLOCALFPI Equipment
Magnifying GlassLOCALMagnifying Glass
Standard workshop equipmentLOCALStandard workshop equipment
Workshop Inspection Equipment0AM53Workshop Inspection Equipment
Vibro engraving equipmentLOCALVibro engraving equipment
Vibration peen equipmentLOCALVibration peen equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-459 AQUEOUS WIPE CLEANER71410CoMat 01-459
CoMat 02-002 ADHESIVE TAPE GENERALPURPOSE PAPERLOCALCoMat 02-002
CoMat 04-009 ANAEROBIC COMPOUNDLOCALCoMat 04-009

Loctite 640

CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)X222XCoMat 06-063
CoMat 07-028 CHROMATE CONVERSION COATING FOR ALUMINUMLOCALCoMat 07-028

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-60-21-220-197 Measure the Minimum Wall Thickness

      1. Measure the wall thickness around the Oil Scavenge Tube Bore.

      1. Refer to Figure.

      2. The minimum thickness must be 0.189 in. (4.8 mm) before starting the repair.

    2. SUBTASK 72-60-21-350-211 Mask the Gearbox Casing

      1. Mask all bores, holes, and passage ways in the proximity of the repair area.

    3. SUBTASK 72-60-21-320-153 Machine the Damaged Bore of the Gearbox Casing

    1. Refer to Figure.

      2. Machine the Bore.

      1. The diameter must be between 1.6169 in. to 1.6248 in. (41.069 mm to 41.269 mm) after the removal of damage.

      2. Measure and record Diameter U.

      3. Inspect the holes for cracks.

      1. Use a magnifying glass. As an alternative, do a local fluorescent penetrant inspection.

      3. Cracks are not allowed.

    4. SUBTASK 72-60-21-330-128 Apply the Surface Protection

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

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

    5. SUBTASK 72-60-21-320-154 Produce a Bushing

    1. Refer to Figure.

      2. Machine the bushing.

      1. Use the specified types of Aluminum alloy. Do not use other types of material.

      2. Make sure you comply with dimensions and tolerances.

      3. Apply the chromate conversion coating to the bushing.

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

    6. SUBTASK 72-60-21-350-212 Install the Bushing into the Machined Hole of the Gearbox Casing

    1. Refer to 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. 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 housing 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).

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

      3. 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.

      Apply CoMat 04-009 ANAEROBIC COMPOUND to the bore and bushing.

      5. Install the bushing into the machined bore.

        1. Use an arbor press.

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

      6. Cure the retaining compound per one of the following options:

      1. 48 hours at room temperature.

      2. 3 hours at 104 deg F (40 deg C).

    7. SUBTASK 72-60-21-320-155 Finish Machine the Bushing

    1. Refer to Figure.

    2. Machine the surface of the bushing flush to 0.005 in. (0.127 mm) below the surface of the Gearbox Casing.

      3. Machine the inner diameter of the bushing.

      1. The dimension must be between 1.4580 in. to 1.4600 in. (37.033 mm to 37.084 mm).

      2. Chamfer where necessary.

    8. SUBTASK 72-60-21-330-129 Apply the Surface Protection

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

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

    9. SUBTASK 72-60-21-350-213 Identify the Repair

      1. Make a mark VRS5710 adjacent to the part number.

      1. Use Vibro engraving equipment. Refer to SPM TASK 70-09-00-400-501 and SUBTASK 70-09-00-400-001.

      2. Protect the marked area.

      1. Do the touch up process. Refer to SPM TASK 70-38-02-300-503.

    10. Figure: Repair Location

    Repair Location

    Figure: Repair Dimensions

    Repair Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added new repair. (19VF828)

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:71410
Enterprise Name:HENKEL CORPORATION (WAS: TURCO PRODUCTS, INC)
BU Name:HENKEL CORPORATION (WAS: TURCO PRODUCTS, INC)
Street:32100 STEPHENSON HIGHWAY
City:MADISON HEIGHTS
State:MI
Zip Code:48071
Country:USA
Phone Number:1-248-583-9300
Fax Number:1-248-583-2976
Internet:www.aerospace.henkel.com
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X222X
Enterprise Name:N/A – REFER TO APPLICABLE COMAT SUFFIX
Manufacturer Code:71410
Supply Number:CoMat 01-459
Type:sp01
Supply Short Name:CoMat 01-459 AQUEOUS WIPE CLEANER
Supply Name:CoMat 01-459 AQUEOUS WIPE CLEANER
Specification Groups:
Doc NumberType
SPMC 148-1TURCO 6780
Suppliers:
ManufacturerRemarks
71410
Manufacturer Code:LOCAL
Supply Number:CoMat 02-002
Type:sp01
Supply Short Name:CoMat 02-002 ADHESIVE TAPE GENERALPURPOSE PAPER
Supply Name:CoMat 02-002 ADHESIVE TAPE GENERALPURPOSE PAPER
Specification Groups:
Doc NumberType
JCR-198SCOTCH 202 PREMIUM GRADE (A-A-883 TYPE I)
OMAT: 237SCOTCH 202 PREMIUM GRADE (A-A-883 TYPE I)
Suppliers:
ManufacturerRemarks
LOCAL
94960
K0993
K6835
Manufacturer Code:05972
Supply Number:CoMat 04-009
Type:sp01
Supply Short Name:CoMat 04-009 ANAEROBIC COMPOUND
Supply Name:CoMat 04-009 ANAEROBIC COMPOUND
Specification Groups:
Doc NumberType
PWA 549-2LOCTITE 640 (GREEN)/RETAINING
Suppliers:
ManufacturerRemarks
05972
Manufacturer Code:X222X
Supply Number:CoMat 06-063
Type:sp01
Supply Short Name:CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)
Supply Name:CoMat 06-063 FLUORESCENT PENETRANT (POST-EMULSIFIED MEDIUM SENSITIVITY)
Specification Groups:
Doc NumberType
It is not permitted to mix the selected CoMat 06‐063 letter suffix material with other CoMat 06‐063 letter suffix materials. Where CoMat 06‐063 is specified with no suffix, use one of the CoMat 06‐063 letter suffix materials.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:LOCAL
Supply Number:CoMat 07-028
Type:sp01
Supply Short Name:CoMat 07-028 CHROMATE CONVERSION COATING FOR ALUMINUM
Supply Name:CoMat 07-028 CHROMATE CONVERSION COATING FOR ALUMINUM
Specification Groups:
Doc NumberType
DELETED. USE COMAT 01-275
Suppliers:
ManufacturerRemarks
LOCAL
Link not Found
Manufacturer Code:LOCAL
Tool Number:Magnifying Glass
Tool Name:Magnifying Glass
Link not Found
Manufacturer Code:LOCAL
Tool Number:Vibration peen equipment
Tool Name:Vibration peen equipment
Link not Found
Manufacturer Code:0AM53
Tool Number:Workshop Inspection Equipment
Tool Name:Workshop Inspection Equipment