TASK 72-42-33-300-022 No. 4 Bearing Front Seal Support - Repair Damaged Threads, Repair-022 (VRS3669)

DMC:V2500-A0-72-42-3301-00A-720A-B|Issue No:002.00|Issue Date:2021-02-01

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 72-42-33-300-022 No. 4 Bearing Front Seal Support - Repair Damaged Threads, Repair-022 (VRS3669)

Effectivty

FIG/ITEM

PART NO.

01-020

2A0851

01-020

2A2833

01-020

2A3537

01-020

2A3845

01-020

2A4323

Material of component

PART IDENT

SYMBOL

MATERIAL

No. 4 bearing seal support assembly

-

Wrought and cast Titanium base alloy

General

Price and availability - none

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

NOTE

Equivalent material or equipment can be used.

NOTE

The tools for the removal and the installation of the inserts can be purchased from Helicoil Products Division/Mite Corporation, Supplier Code 01556, Danbury CT 06810. Helicoil part numbers are provided in this repair.

Preliminary Requirements

Pre-Conditions

Action/ConditionData Module/Technical Publication
Make sure that all the cleaning and inspection procedures are done before this repair.

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Removal toolLOCAL1227-6

(Helicoil Products)

Outer helical wire thread insert tang removal toolLOCAL4032-4

(Helicoil Products)

Tang removal toolLOCAL3695-4

(Helicoil Products)

Thread insert installation toolLOCAL2705-4

(Helicoil Products)

Installation toolLOCAL7552-4

(Helicoil Products)

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
Outer insert (free running)0AM532391-4CN3751 - 4
Inner insert (screw locking)0AM534691-4CN3391 - 4

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-33-350-079 Remove the Damaged or Loose Inserts from the Boss

      1. Remove the damaged or loose inserts from the boss.

      1. Refer to the SPM TASK 70-35-08-300-501.

        Use tool P/N 1227-6.

        Refer to Figure, Figure, Figure and Figure.

        NOTE

        If the hole is already tapped for a double helical wire thread insert, it is permitted to install a double helical wire thread insert by Steps 7, 8 and 10.

    2. SUBTASK 72-42-33-220-106 Do an Inspection of the Double Helical Insert Location for Machining and Installation

      1. Do a dimensional inspection to make sure boss proportions are sufficient for machining.

      1. Refer to Figure , Figure and Figure.

    3. SUBTASK 72-42-33-320-074 Machine and Tap Holes for Double Helical Insert

      1. Machine and tap holes for double helical insert.

      1. Refer to Figure, Figure, Figure and Figure.

        Use Tap P/N 3893-4.

    4. SUBTASK 72-42-33-220-107 Do a Crack Test on the Repaired Area

      1. Do a crack test on the repaired area.

      1. Refer to the SPM TASK 70-23-01-230-501.

        Refer to Figure, Figure, Figure and Figure.

    5. SUBTASK 72-42-33-350-080 Install the Outer Inserts

      1. Install the outer inserts and break off the tangs.

    6. SUBTASK 72-42-33-350-081 Install the New Inserts

      1. Install the new inner inserts and break off the tangs.

    7. SUBTASK 72-42-33-220-108 Examine the Inserts

      1. Examine the inserts.

      1. Refer to the SPM TASK 70-23-01-230-501.

        Refer to Figure, Figure, Figure and Figure.

    8. Figure: No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 1

    Legend
    No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 1

    Close

    Figure: No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 2

    Legend
    No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 2

    Close

    Figure: No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 3

    Legend
    No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 3

    Close

    Figure: No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 4

    Legend
    No. 4 Bearing Seal Support Assembly Thread Repair

    Sheet 4

    Close

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Revised effectivity table and added prerequisites. (16VC287)

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:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Link not Found
Manufacturer Code:LOCAL
Tool Number:1227-6
Tool Name:Removal tool
Manufacturer Code:LOCAL
Tool Number:2705-4
Tool Name:Thread insert installation tool
Manufacturer Code:LOCAL
Tool Number:3695-4
Tool Name:Tang removal tool
Manufacturer Code:LOCAL
Tool Number:4032-4
Tool Name:Outer helical wire thread insert tang removal tool
Manufacturer Code:LOCAL
Tool Number:7552-4
Tool Name:Installation tool