TASK 72-43-20-300-016 No. 4 Bearing Face Seal - Repair Anti-Rotation Pin Slots, Repair-016 (VRS3675)

DMC:V2500-A0-72-43-2002-01A-652A-C|Issue No:002.00|Issue Date:2014-05-01

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 72-43-20-300-016 No. 4 Bearing Face Seal - Repair Anti-Rotation Pin Slots, Repair-016 (VRS3675)

Effectivity

FIG/ITEM

PART NO.

01-208

2A3499

01-180

2A3517

Material of component

PART IDENT

SYMBOL

MATERIAL

No. 4 bearing seal support

-

Titanium alloy

General

Do an inspection of the bearing face seal by TASK 72-43-20-200-002, INSPECTION.

Price and availability - refer to IAE

Make sure that the cleaning and inspection procedures are done before this repair.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NONE

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 03-392 WELDING WIRELOCALCoMat 03-392

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Bushing2A3857N/A
P-Sized BushingVRS3675-P1N/A
P-Sized BushingVRS3675-P2N/A
P-Sized BushingVRS3675-P3N/A
Rivet(XL) AN 1234882 (for each bushing)

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-43-20-320-062 Remove Bushings

      NOTE

      If this repair has been done before remove bushings as follows:

      1. Drill or machine the manufactured end of rivets so that the remainder can be punched out.

      1. Do not enlarge flange hole when machining or drilling pin shank.

        NOTE

        Avoid damaging the seal housing when drifting pin from flange.

      2. Do an inspection of the rivet holes.

      1. Refer to the SPM TASK 70-39-03-390-501.

      3. Continue with step 7.

      1. Refer to Step.

        OR.

    4. If the flange rivet hole is damaged or worn proceed with the steps that follow.

    2. SUBTASK 72-43-20-320-063 Remove the Carbon Detail

      1. Drill three equally spaced 0.125 in. (3.175 mm) diameter holes in the carbon.

      1. Be careful not to drill into the metal housing.

    2. Pry the carbon off of the assembly from these drilled holes so that it breaks away.

      OR.

      3. Heat assembly to relax the tight fit.

      1. Heat to 900 deg F plus or minus 50 deg F (482 deg C plus or minus 10 deg C).

    4. Remove carbon from metal carrier.

    3. SUBTASK 72-43-20-350-072 If the Rivet Holes must be Restored to Repair Wear or to get the Correct Position of the new Bushings, do the Following

    1. Refer to Figure and Figure.

      2. If necessary, repair the rivet holes.

        1. Use a clean austenitic stainless steel brush or silicon carbide abrasives to remove oxides from the repair area for welding.

        1. Refer to Index in Figure.

        2. Clean the repair area.

        1. Refer to the SPM TASK 70-11-26-300-503.

        3. Weld the rivet holes.

        1. Refer to the SPM TASK 70-31-13-310-501. Use CoMat 03-392 WELDING WIRE and the Manual Gas Tungsten Arc (GTAW-MA) method.

      4. Machine/grind the welds at the rivet holes on both sides of the flange.

        5. Do a stress relieve of the face seal assembly.

        1. Refer to the SPM TASK 70-37-07-370-501.

        6. Check hardness at one location.

        1. Refer to Index 11 in Figure.

          25 to 38 HRC is acceptable.

        7. Do a fluorescent penetrant inspection of the face seal assembly.

        8. Do a dimensional inspection of the carbon interface bore.

        1. Refer to Figure.

        9. Clean the repair area.

        1. Refer to the SPM TASK 70-11-26-300-503.

    4. SUBTASK 72-43-20-320-064 Machine the Slots

    1. Refer to Figure, Figure and Figure.

    2. Machine the slots in housing and flange thickness at location E to accept bushing PN 2A3857.

      3. If you use a P-sized bushing.

      1. Do a machine operation of the slot width to the limits given in Figure.

    4. Locally make a bushing to the limits given in Figure and Figure.

    5. SUBTASK 72-43-20-350-069 Position the Bushings

    1. Refer to Figure and Figure.

      2. Position the bushings at the two slots on housing machined in step 7.

      1. Refer to Step and Figure.

        NOTE

        Maintain true position of bushing in slot by Figure, Index 2, 4 and 7, and true position of machined slot, shown in Figure.

      3. Secure the bushings with rivets.

      1. Refer to Figure.

        Refer to the SPM TASK 70-39-03-390-501, but it is permitted for the rivet head to be minus 0.010 in. (0.25 mm) to plus 0.005 in. (0.13 mm) above the part surface afer riveting.

        NOTE

        The minimum edge distance requirements of the SPM TASK 70-39-03-390-501 are waived.

    6. SUBTASK 72-43-20-220-097 Examine the Bushings

    1. Refer to Figure.

      2. Examine the bushings and make sure VRS3675 is marked adjacent to the part number.

      1. Refer to Figure.

    7. SUBTASK 72-43-20-350-070 Install the Carbon Detail

      1. Install the carbon detail by VRS3676 TASK 72-43-20-300-017 (72-43-20).

      1. Deleted.

    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

    Figure: Repair Details and Dimensions

    Sheet 3

    Legend
    Repair Details and Dimensions

    Sheet 3

    Close

    Figure: Repair Details and Dimensions

    Sheet 4

    Legend
    Repair Details and Dimensions

    Sheet 4

    Close

    Figure: Repair Details and Dimensions

    Sheet 5

    Legend
    Repair Details and Dimensions

    Sheet 5

    Close

    Figure: Repair Details and Dimensions

    Sheet 6

    Legend
    Repair Details and Dimensions

    Sheet 6

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised Fig 901, Sheet 6. (10VC296B)

Change Type:

Modified the common info. (PSAF13VC167)

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Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
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Manufacturer Code:LOCAL
Supply Number:CoMat 03-392
Type:sp01
Supply Short Name:CoMat 03-392 WELDING WIRE
Supply Name:CoMat 03-392 WELDING WIRE
Specification Groups:
Doc NumberType
AMS 577651410
Suppliers:
ManufacturerRemarks
LOCAL
2R602
58401
55596