TASK 71-52-43-300-006 EEC Core Harness And Voltage Divider Harness Assembly - Adding Sealant To BiFi Connectors To Avoid Moisture Ingress, Repair-006 (VRS9906)

DMC:V2500-A5-71-52-4300-00A-621A-C|Issue No:002.00|Issue Date:2020-05-01

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 71-52-43-300-006 EEC Core Harness And Voltage Divider Harness Assembly - Adding Sealant To BiFi Connectors To Avoid Moisture Ingress, Repair-006 (VRS9906)

Effectivity

FIG./ITEM

PART NO.

01-005

6A8171

01-005

6A8172

General

This TASK details the procedure for the adding sealant to BiFi connectors to avoid moisture ingress.

Effectivity

Equipment and materials

General

All illustrations/Figs

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
IAE 3J12704 Wrench and holderLOCALIAE 3J12704

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 02-146 LOCKWIRELOCALCoMat 02-146
CoMat 08-013 COLD CURING SILICONE COMPOUNDX222XCoMat 08-01375 ml

Silcoset 152 (when ordering small tube tip is necessary)

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 71-52-43-360-001Prepare the Harness Adjacent to the Electrical Connector or Receptacle

    1. Refer to Figure.

      2. Remove the clamp bar and move back the bush.

      1. Remove the safety wire, two screws, and clamp bar. Carefully push the bush rearwards. After removing clamp with bushing and lifting it up, ground cables have to be lifted as much as possible but without damaging or severing them. Be very careful to prevent damage.

    2. SUBTASK 71-52-43-360-002Remove the Backshell Nut from the Backshell

    1. Refer to Figure.

      2. Remove the backshell nut.

      1. lnstall the electrical connector assembly to the IAE 3J12704 Wrench and holder, 1 off. Disconnect the backshell nut and move it along the cables.

    3. SUBTASK 71-52-43-360-003Applying Cold Curing Silicone Compound

      NOTE

      The connector must be dry before starting the task. lf the connector is damp, use the cloth to wipe it. The cables must be undamaged. lf cables are damaged, repair them first.

    1. Fill the back of the connector with CoMat 08-013 COLD CURING SILICONE COMPOUND (one 75 ml tube can be used to fill both connectors) to completely cover the contacts inlets and sealing plugs with homogeneous layer of sealant (no more than 35 ml per connector). During silicone application on inside of connector it is recommended to do some wiggling with harness, to ensure that silicone layer is distributed evenly.

    2. Wait until Silicon is fully cured 48 hours at 59 to 95 deg F (15 to 35 deg C) and in between 40 percent and 70 percent relative humidity. Do not apply a load during this time.

    4. SUBTASK 71-52-43-360-004lnstall the Backshell Nut to the Backshell

    1. Attach and tighten the backshell nut to the backshell so the different parts hold the screen braid tails.

    5. SUBTASK 71-52-43-360-005 Finish the Harness Adjacent to the Electrical Connector or Receptacle

      1. lnstall the bush and clamp bar adjacent to the electrical connector or receptacle.

      1. Push the bush forward so it packs the cables at the forward clamp bars. Attach the clamp bars together with the two screws, tighten the screws.

      2. Safety the parts.

      1. Safety the backshell, nuts, and screws with CoMat 02-146 LOCKWIRE.

    6. SUBTASK 71-52-43-360-006Identify the Repair

      1. Make a mark VRS9906/A0 on the identification sleeve of the harness adjacent to the part number.

      1. Use permanent marker.

    7. Figure: Repair Details and Dimensions

    Repair Details and Dimensions

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Fix Subtask numbers from XXX (19VU501)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:X222X
Enterprise Name:N/A – REFER TO APPLICABLE COMAT SUFFIX
Manufacturer Code:LOCAL
Supply Number:CoMat 02-146
Type:sp01
Supply Short Name:CoMat 02-146 LOCKWIRE
Supply Name:CoMat 02-146 LOCKWIRE
Specification Groups:
Doc NumberType
AIA/NAS NASM20995 Part Number MS20995C20 (0,5 MM)
Suppliers:
ManufacturerRemarks
LOCAL
Manufacturer Code:X222X
Supply Number:CoMat 08-013
Type:sp01
Supply Short Name:CoMat 08-013 COLD CURING SILICONE COMPOUND
Supply Name:CoMat 08-013 COLD CURING SILICONE COMPOUND
Specification Groups:
Doc NumberType
If CoMat 08-013 is specified without an asterisk or a letter suffix, use one of the letter suffix alternative materials.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:LOCAL
Tool Number:IAE 3J12704
Tool Name:IAE 3J12704 Wrench and holder