TASK 72-42-11-300-002 Diffuser Case - Replace The Helical Coil Inserts, Repair-002 (VRS3026)

DMC:V2500-A0-72-42-1100-01A-920A-C|Issue No:003.00|Issue Date:2014-11-01

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 72-42-11-300-002 Diffuser Case - Replace The Helical Coil Inserts, Repair-002 (VRS3026)

Effectivity

FIG/ITEM PART NO.

01-010

2A0051

01-010

2A2081-01

01-010

2A2581-01

01-010

2A2883-01

01-010

2A2889-01

01-010

2A2896-01

01-010

2A2885-01

01-010

2A2891-01

01-010

2A2897-01

Material of component

RR

DESCRIPTION SYMBOL MATERIAL

Diffuser case assembly

-

Nickel Alloy

General

Price and availability - refer to IAE

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

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.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Removal toolLOCAL1227-6

(Helicoil Products)

Thread plug gageLOCAL3694-4

(Helicoil Products)

Tang removal toolLOCAL3695-4

(Helicoil Products)

Plug tapLOCAL4FPB

(Helicoil Products)

Installation toolLOCAL7552-4

(Helicoil Products)

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
InsertLOCAL1191-4TN375

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-11-350-055 Remove the Inserts from the Diffuser Case

    1. Refer to Figure.

      2. Remove loose or damaged inserts from the diffuser case.

    2. SUBTASK 72-42-11-320-051 Machine the Damaged Threads

      CAUTION

      THE WALL THICKNESS OF THE BOSSES CANNOT BE DECREASED BELOW 0.130 INCH (3.302 MM) FROM THE MINOR DIAMETER OF THE THREADS.

    1. Refer to Figure and Figure.

      2. CAUTION

        DO NOT DRILL OR TAP INTO THE DIFFUSER CASE WALL WHEN YOU DO THE HOLE REPAIR.

        Machine the damaged threads to a minor diameter of 0.2577 - 0.2646 in. (6.546 - 6.721 mm).

      1. The hole must be in 0.010 in. (0.254 mm) diameter of true position in relation to Surface A and the initial location of the damaged thread minor diameter. Refer to Figure.

    3. Machine the lead-in chamfer of 120 + 5 degrees included to a diameter of 0.290 - 0.320 in. (7.37 - 8.13 mm).

      4. Tap the hole and remove the chips.

    3. SUBTASK 72-42-11-220-060 Examine the Threads

      1. Examine the threads after you tap them.

    4. SUBTASK 72-42-11-350-056 Install the New Helical Coil Inserts

    1. Refer to Figure and Figure.

    2. Put the PN 1191-4TN375 insert onto the tip of the Installation tool.

    3. Put the insert into the threaded hole.

    4. Turn the handle clockwise so the top of the insert is three quarters to one and a half pitch below the face of the boss.

      NOTE

      You can make the insert shorter so that the top thread is below the top surface and the bottom thread does not extend through the hole.

      5. Break the tang of the insert at the notch.

    5. SUBTASK 72-42-11-220-061 Examine the Repair

      1. Examine the new inserts.

      1. Refer to TASK 72-42-11-200-000 (INSPECTION-000).

    6. 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:

Modified Figure 2. (EA14VC199)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Tool Number:1227-6
Tool Name:Removal tool
Manufacturer Code:LOCAL
Tool Number:3694-4
Tool Name:Thread plug gage
Manufacturer Code:LOCAL
Tool Number:3695-4
Tool Name:Tang removal tool
Manufacturer Code:LOCAL
Tool Number:4FPB
Tool Name:Plug tap
Manufacturer Code:LOCAL
Tool Number:7552-4
Tool Name:Installation tool