TASK 72-42-11-300-021 Diffuser Case - Replace The Helical Coil Inserts In The Borescope Bosses, Repair-021 (VRS3058)

DMC:V2500-A0-72-42-1100-04A-920A-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 72-42-11-300-021 Diffuser Case - Replace The Helical Coil Inserts In The Borescope Bosses, Repair-021 (VRS3058)

Effectivity

FIG/ITEM PART NO.

01-010

2A0051

01-010

2A2081-01

01-010

2A2581-01

01-010

2A2883-01

01-010

2A2885-01

01-010

2A2889-01

01-010

2A2891-01

01-010

2A2896-01

01-010

2A2897-01

Material of component

IAE

DESCRIPTION SYMBOL MATERIAL

Diffuser case assembly

Inconel 718

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 the Helicoil Products Division/Mite Corporation, Supplier Code 01556, Danbury, CT 06810.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Removal toolsLOCAL1227-16

(Helicoil Products)

Thread plug gageLOCAL1694-9

(Helcoil Products)

Plug tapLOCAL38193-9

(Helicoil Products)

Installation toolLOCAL535-9

(Helicoil Products)

Needle nose pliersLOCALNeedle nose pliers

Consumables, Materials and Expendables

NONE

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
InsertLOCAL1191-9TN375AR

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-42-11-350-081 Remove the Inserts from the Diffuser Case

    1. Refer to: Figure and Figure

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

      1. Use PN 1227-16 removal tool.

    2. SUBTASK 72-42-11-320-063 Machine the Damaged Threads

      CAUTION

      THE WALL THICKNESS OF THE BOSSES CANNOT BE DECREASED BELOW 0.130 IN. (3.302 MM) FROM THE MINOR DIAMETER OF THE THREADS AT LOCATION C.

    1. Refer to: Figure and Figure

      2. Machine the damaged threads to a minor diameter of 0.5745 to 0.5826 in. (14.592 to 14.798 mm).

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

    3. Machine the lead-in chamfer of 120 degrees for a diameter of 0.620 to 0.650 in. (15.748 to 16.510 mm).

      4. Tap the hole and remove the chips.

      1. Use PN 38193-9 plug tap.

    3. SUBTASK 72-42-11-220-080 Examine the Threads

      1. Examine the threads after you tap them.

      1. Use PN 1694-9 thread plug gage.

    4. SUBTASK 72-42-11-350-082 Install the New Helicoil Coil Inserts

    1. Refer to Figure and Figure.

    2. Put the PN 1191-9TN375 insert into the tip of the PN 535-9 insertion 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 halfpitch below the face of the boss.

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

      1. Use needle nose pliers to remove the tang.

    5. SUBTASK 72-42-11-220-081 Examine the Repair

      1. Examine the new inserts.

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

    6. SUBTASK 72-42-11-350-083 Mark the Part

      1. Mark the repair number VRS3058 on the diffuser case adjacent to the part number.

      1. Mark the part by the procedure given in the SPM TASK 70-09-00-400-501.

        Use the vibration peen method.

        NOTE

        If the VRS number is marked on the part, do not mark the repair number again.

    7. Figure: Repair Details and Dimensions (PN2A0051, 2A2883-01, 2A2889-01 and 2A2896-01)

    Repair Details and Dimensions (PN2A0051, 2A2883-01, 2A2889-01 and 2A2896-01)

    Figure: Repair Details and Dimensions (PN2081-01, 2A2581-01, 2A2891-01 and 2A2897-01)

    Repair Details and Dimensions (PN2081-01, 2A2581-01, 2A2891-01 and 2A2897-01)

Requirements After Job Completion

Follow-On Conditions

NONE
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Manufacturer Code:LOCAL
Tool Number:1227-16
Tool Name:Removal tools
Manufacturer Code:LOCAL
Tool Number:1694-9
Tool Name:Thread plug gage
Manufacturer Code:LOCAL
Tool Number:38193-9
Tool Name:Plug tap
Manufacturer Code:LOCAL
Tool Number:535-9
Tool Name:Installation tool
Manufacturer Code:LOCAL
Tool Number:Needle nose pliers
Tool Name:Needle nose pliers