TASK 72-38-25-300-002 Bifurcation Panel Assembly - "U" Seal And Clip Repair, Repair-002 (VRS9669)

DMC:V2500-A0-72-38-2501-01A-920A-C|Issue No:001.00|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 72-38-25-300-002 Bifurcation Panel Assembly - "U" Seal And Clip Repair, Repair-002 (VRS9669)

General

Make sure that all the cleaning and inspection procedures are done before this repair per the applicable IAE Engine Manual ATA 72-38-25.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Standard Workshop EquipmentLOCALStandard Workshop Equipment

Consumables, Materials and Expendables

NameManufacturerPart Number / IdentificationQuantityRemark
CoMat 01-031 ACETONE (CH3)2COK6835CoMat 01-031
CoMat 02-099 LINT-FREE CLOTHLOCALCoMat 02-099
CoMat 05-016 GARNET PAPER, 80-GRITK3895CoMat 05-016

Grit Size 80

CoMat 08-013 COLD CURING SILICONE COMPOUNDLOCALCoMat 08-013

Silcoset 152

Spares

NameManufacturerPart Number / IdentificationQuantityRemark
"U" SealLOCALARM13171
"U" Seal, ClipLOCAL6A79341

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-38-25-350-001 Remove Damaged "U" Seal

      1. As necessary, remove damaged "U" Seal. Refer to Figure and Figure.

      1. CAUTION

        CARE MUST BE TAKEN NOT TO DAMAGE SEAL(S) THAT ARE NOT BEING REPLACED OR THE BUNGS AT THE JUNCTION BETWEEN THE SEALS.

        Use a sharp knife to cut through the existing sealant at the interface between the side seals and the "U" seal.

      2. Carefully remove the existing "U" seal from between the bifurcation panel and the seal clips by pulling from one end and work around the "U" until the seal is free. Discard removed item.

      3. Remove the "U" seal clip from the bifurcation panel. Discard removed item.

    2. SUBTASK 72-38-25-350-002 Remove Sealant from "U" Seal and Bungs

    1. Refer to Figure.

    2. CAUTION

      CARE MUST BE TAKEN NOT TO DAMAGE THE MATING SURFACES OR BUNGS AT THE JUNCTION BETWEEN SEALS.

      Carefully remove the sealant from the bungs and the ends of seals in order to accommodate the replacement "U" seal.

    3. Carefully remove all remaining traces of sealant using CoMat 05-016 GARNET PAPER, 80-GRIT.

    4. Clean mating surfaces at the ends of the side seals and bungs using CoMat 02-099 LINT-FREE CLOTH moistened with CoMat 01-031 ACETONE (CH3)2CO.

    3. SUBTASK 72-38-25-350-003 Fit Replacement "U" Seal

    1. Refer to Figure, Figure and Figure.

    2. Apply sealant to the ends of the replacement ARM1317 using CoMat 08-013 COLD CURING SILICONE COMPOUND (Silcoset 152) per SPM TASK 70-36-02-360-501, SUBTASK 70-36-02-360-020.

    3. Apply sealant to the connecting end of the side seals and bungs using CoMat 08-013 COLD CURING SILICONE COMPOUND (Silcoset 152) per SPM TASK 70-36-02-360-501, SUBTASK 70-36-02-360-020.

    4. Attach the "U" seal to the side seals over the bungs ensuring a neat and flush fit is achieved.

    5. The maximum separation between seal ends must be less than 0.059 in (1.50 mm).

      NOTE

      Ensure the side seals fit flush with the "U" seal.

    6. Position "U" seals in place along the panel.

    7. Remove any excess sealant compound from the area of the joints using CoMat 02-099 LINT-FREE CLOTH moistened with CoMat 01-031 ACETONE (CH3)2CO.

    4. SUBTASK 72-38-25-350-005 Fit Replacement Seal Clip

    1. Refer to Figure and Figure.

    2. Fit replacement 6A7934 into position on the bifurcation panel and over the "U" seal lip.

    3. Ensure that the replacement clip is pushed down firmly and clip tang engages into the tang slot.

    4. Tang will audibly click as it engages.

    5. You must hear each of the 5 tangs click as they engage.

    6. Remove any excess sealant compound from the area of repair using CoMat 02-099 LINT-FREE CLOTH moistened with CoMat 01-031 ACETONE (CH3)2CO.

    7. Silicone must be smooth and flush with the contour of the seal and fill the separation between the "U" and side seals.

    8. Allow the silicone compound to cure for 12 hours at 61°F (16°C).

      NOTE

      It is ok to handle the part after 2 hours, however the silicone will not be fully cured for 12 hours and no load should be applied during that time.

    5. SUBTASK 72-38-25-220-001 Visual and Dimensional Inspection of the Repair Areas

    1. Refer to Figure and Figure.

    2. Visually examine the silicone compound on the repair areas. No holes or splits should be seen at the joints. Repair areas must be smooth and flush with the seal contour.

    3. Ensure there are no open gas paths at joint between side seals and "U" seal. If any crack or separation is seen then the repair should be repeated.

    4. Dimensionally examine gap at the joints between the "U" seal and side seals ends. Joint gap must not exceed 0.059 in (1.50 mm).

    6. Postrequisites

      1. Mark bifurcation panel. Refer to Figure.

      1. Mark the part by vibropeening "VRS9669" in the part marking area per SPM TASK 70-09-00-400-501, SUBTASK 70-09-00-400-001.

    7. Figure: Bifurcation Panel General

    Bifurcation Panel General

    Figure: Bifurcation Panel Port Side View

    Bifurcation Panel Port Side View

    Figure: Bifurcation Panel Showing Bungs At "U" Seal (Side Seals Removed For Clarity)

    Bifurcation Panel Showing Bungs At "U" Seal (Side Seals Removed For Clarity)

    Figure: Bifurcation Panel Section View Seals & Clips

    Bifurcation Panel Section View Seals & Clips

    Figure: Bifurcation Panel Marking Area & Seal Gap

    Bifurcation Panel Marking Area & Seal Gap

    Figure: Bifurcation Panel Seal Clips

    Bifurcation Panel Seal Clips

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Added new repair. (EA14VC258)

Manufacturer Code:K3895
Enterprise Name:DELETED. REFER TO VENDOR CODE KC1D9.
Manufacturer Code:K6835
Enterprise Name:MED-LAB LTD
BU Name:MED-LAB LTD
Street:COPELAND ST
City:DERBY
Zip Code:DE1 2PU
Country:GREAT BRITAIN
Phone Number:44-1332-349094
Fax Number:44-1332-371237
Email:sales@med-lab.co.uk
Internet:www.med-lab.co.uk
Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Link not Found
Link not Found
Manufacturer Code:LOCAL
Supply Number:CoMat 01-031
Type:sp01
Supply Short Name:CoMat 01-031 ACETONE (CH3)2CO
Supply Name:CoMat 01-031 ACETONE (CH3)2CO
Specification Groups:
Doc NumberType
OMAT: 150 (RR REF)COMMERCIAL GRADE O-A-51
PMC 9008 (PW REF)COMMERCIAL GRADE O-A-51
JCR-041 (JAEC REF)COMMERCIAL GRADE O-A-51
MTH 169 (98%) (MTU REF)COMMERCIAL GRADE O-A-51
Suppliers:
ManufacturerRemarks
LOCAL
K6835
81348
K3504
U1185
24853
70657
Manufacturer Code:X222X
Supply Number:CoMat 02-099
Type:sp01
Supply Short Name:CoMat 02-099 LINT-FREE CLOTH
Supply Name:CoMat 02-099 LINT-FREE CLOTH
Specification Groups:
Doc NumberType
WHERE COMAT 02-099 IS SPECIFIED WITH NO SUFFIX, USE COMAT 02-099A OR COMAT 02-099B.
Suppliers:
ManufacturerRemarks
X222X
Manufacturer Code:0KHE3
Supply Number:CoMat 05-016
Type:sp01
Supply Short Name:CoMat 05-016 GARNET PAPER, 80-GRIT
Supply Name:CoMat 05-016 GARNET PAPER, 80-GRIT
Specification Groups:
Doc NumberType
GARNET PAPER, CAMI GRIT SIZE 80 GRADE 0 (ANSI B74.18)
Suppliers:
ManufacturerRemarks
0KHE3
1E1X8
LOCAL
C4347
K0993
K2F42
K6835
V571V
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:Standard Workshop Equipment
Tool Name:Standard Workshop Equipment