TASK 72-42-20-300-021 No. 4 Bearing Compartment Cooling Air Tube - Nickel Plate The Outer Sealing Surface, Repair-021 (VRS3579)

DMC:V2500-A0-72-42-2051-00A-647A-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 72-42-20-300-021 No. 4 Bearing Compartment Cooling Air Tube - Nickel Plate The Outer Sealing Surface, Repair-021 (VRS3579)

Effectivity

FIG/ITEM

PART NO.

05-020

2A1031-01

05-020

2A3187-01

05-020

2A1044

Material of component

PART IDENT

SYMBOL

MATERIAL

No. 4 Bearing Cooling Tubes

Stainless Steel

General

Price and Availability - Refer to IAE.

The practices and processes referred to in the procedure by the TASK number are in the SPM.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Nickel plating eqiupmentLOCALNickel plating equipment

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-20-320-082 Machine No. 4 Cooling Tube Outer Surfaces

    1. Refer to Figure.

      2. Machine the outer tube surfaces.

      1. Remove the least amount of material. Do not go below 0.540 in. (13.72 mm) diameter.

      3. Examine the outer tube surfaces.

        1. Diameter is less than 0.540 in. (13.72 mm) or damage is present when diameter is 0.540 in. (13.72 mm).

        1. Do not continue this repair. Repair by VRS3643, (Repair-017)TASK 72-42-20-300-017 .

    2. SUBTASK 72-42-20-330-007 Nickel Plating of Machined Surface

      1. Nickel plate machined surface not more than 0.576 in. (14.63 mm) diameter.

      1. Refer to SPM TASK 70-33-25-300-503.

        NOTE

        Plating is permitted outside machined area but must be removed. No plating permitted in seal grooves.

    3. SUBTASK 72-42-20-320-083 Finish Machine Outer Tube Surfaces

      1. Finish machine outer tube surfaces to between 0.556 and 0.560 in. (14.12 and 14.22 mm) diameter.

      1. Refer to Figure.

        NOTE

        Maintain a minimum wall thickness of 0.070 in. (1.78 mm).

    4. SUBTASK 72-42-20-320-084 Machine the Seal Grooves For Oversize Piston Rings

      1. Measure width of the seal ring groove at the wear location.

      1. Refer to Figure.

        NOTE

        Wear can be uneven on groove surfaces.

      2. Wear is more than 0.003 in. (0.08 mm).

      1. Machine to subsequent oversize groove width.

      2. Refer to Figure and Figure.

        NOTE

        The minimum wall thickness on the side of the groove after material removal must not be less than 0.040 in. (1.02 mm).

        3. Break edge not more than 0.003 in. (0.08 mm).

        1. Refer to Figure.

        4. Modified radius between 0.005 and 0.015 in. (0.13 and 0.38 mm).

        1. Refer to Figure.

    5. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

    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
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Nickel plating equipment
Tool Name:Nickel plating eqiupment