# Dassault Service Bulletin F900-485: No revision named

- Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2023-1402, the docket of AD 2023-18-08. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Dassault Service Bulletin F900-485](https://openairdocs.org/service-documents/dassault/f900-485.md)
- Title as filed: SB F900-485
- Pages: 8
- PDF: https://openairdocs.org/files/sha256/ad/8f/ad8fef371edc2e8417724f39048928c6ef6fd1d10a2b8afbba9948a85d7e856c
- Page: https://openairdocs.org/service-documents/dassault/f900-485/file/ad8fef371edc

## Text

Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1

FALCON 900
No 485
JANUARY 16, 2023
MANDATORY
ATA 30-13
ICE AND RAIN PROTECTION
WING ANTI-ICING
INSPECTION OF WING ANTI-ICING WIGGINS
COUPLINGS
FALCON SERVICE BULLETIN
Copyright © 2023 by Dassault Aviation
All rights reserved. No part of this work may be reproduced or copied
in any form or by any means without written permission
of Dassault Aviation.
447

### Page 2

ICE AND RAIN PROTECTION
WING ANTI-ICING
INSPECTION OF WING ANTI-ICING WIGGINS COUPLINGS
Initial issuance January 16, 2023
List of effective pages:
1 to 6
FALCON 900 F900 -485
F900 -30-13

### Page 3

ICE AND RAIN PROTECTION
WING ANTI-ICING
INSPECTION OF WING ANTI-ICING WIGGINS COUPLINGS
 
1. PLANNING INFORMATION
A. EFFECTIVITY
This Service Bulletin is applicable to FALCON 900 aircraft with serial numbers 1 thru 202 that have not
performed the general visual inspection of the wings (Refer to TASK 57-00-00-210-801), included in
Aircraft Maintenance Manual Revision 56 - Update 3, after April 8, 2021.
B. REASON
Occurrences of wing anti-icing leaks in the wing leading edge, due to incorrect installation of Wiggins
coupling on the wing anti-icing system, were observed in service.
These conditions, if not detected and corrected, can result in degraded wing anti-icing performance.
The purpose of this Service Bulletin is to inspect the wing anti-icing Wiggins couplings.
C. DESCRIPTION
The operation consists in checking the wing anti-icing Wiggins couplings for correct installation.
D. COMPLIANCE
Mandatory as prescribed by the Airworthiness Authorities of the country of registration of the aircraft.
E. APPROVAL
The technical content of this document is approved under the authority of the DOA ref. EASA.21J.051.
F. LABOR
Estimated labor-hours: Refer to Service Bulletin Commercial Summary.
NOTE: These labor-hours only concern the work described in this Service Bulletin and do not include
other maintenance work that may be performed on this occasion.
FALCON 900 F900 -485
January 16, 2023 F900 -30-13
Initial issuance Page 1 / 6
DASSAULT AVIATION Proprietary Data

### Page 4

G. MATERIAL - PRICE AND AVAILABILITY
The modification kit may be obtained from either address listed below:
Western hemisphere: DASSAULT FALCON JET CORP.
SPARES DISTRIBUTION CENTER
200 RISER ROAD
LITTLE FERRY, NJ 07643 U.S.A.
Telephone:
• U.S.A. and CANADA:1-800-800-4036
• MEXICO: 001-800-800-4036
• Other countries: 1-201-541-4809
Email to: Customer.Care@DassaultFalconJet.com
Other continents: DASSAULT AVIATION
Falcon Spares
54, AVENUE MARCEL DASSAULT
B.P. 24
33701 MERIGNAC Cedex (FRANCE)
Telephone: 33 (0)5.56.18.44.44
Email to: dafsorders@dassault-aviation.com
Price and availability on request.
H. TOOLING
- TOOL BOX (TO-20-008).
I. WEIGHT AND BALANCE
Change in weight: None.
Change in balance with respect to 25% MAC: None.
J. REFERENCES
Aircraft Maintenance Manual:
• GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801)
• USE OF THE AIRCRAFT MAINTENANCE PROCEDURES (Refer to TASK 20-00-00-910-803)
• REMOVAL / INSTALLATION OF WIGGINS W991 COUPLINGS (Refer to TASK
20-41-00-900-801)
• GENERAL VISUAL INSPECTION OF THE WINGS (Refer to TASK 57-00-00-210-801)
FALCON 900 F900 -485
January 16, 2023 F900 -30-13
Initial issuance Page 2 / 6
DASSAULT AVIATION Proprietary Data

### Page 5

2. ACCOMPLISHMENT INSTRUCTIONS
A. PRELIMINARY STEPS
(1) Obey the general maintenance and safety precautions (Refer to TASK 20-00-00-910-801).
(2) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-803).
(3) Fully extend the slats (Refer to TASK 27-50-00-860-802  - "EXTENSION IN NORMAL MODE").
(4) Inhibit slat deflection (Refer to TASK 27-50-00-860-802  - "EXTENSION IN NORMAL MODE" )
"OPERATION ON SLATS OR FLAPS EXTENDED").
(5) De-energize the aircraft systems (Refer to TASK 24-00-00-860-801).
(6) Remove:
• wing lower surface inboard leading edge access panel  (512BB) / wing lower surface
inboard leading edge access panel (612BB),
• wing lower surface inboard leading edge access panel  (512CB) / wing lower surface
inboard leading edge access panel (612CB),
• wing lower surface outboard leading edge access panel No. 1 (522AB) / wing lower surface
outboard leading edge access panel No. 1 (622AB).
B. PROCEDURE
CAUTION: THE CLAMP MUST ROTATE FREELY AROUND THE TWO FERRULES.
(1) Check the wing anti-icing Wiggins couplings ( 1-fig. ) on LH and RH sides for:
• condition,
• correct installation,
• deformation,
• leakage or signs of overheating,
• free rotation of the clamp around the two ferrules.
(2) In case of findings, replace or re-install the affected wing anti-icing Wiggins coupling with new
seals (Refer to TASK 20-41-00-900-801).
C. FINAL STEPS
(1) Install the access panels and doors removed previously.
(2) Return the aircraft to the initial configuration.
D. RECORDING
Record compliance with this Service Bulletin in the appropriate aircraft documents.
Fill out the electronic Service Bulletin reply form accessible from the ”Service Bulletin" page on the
Falcon portal or register SB implementation at Sbconfiguration@dassault-aviation.com, providing all
useful information for aircraft identification:
• aircraft type and serial number,
• SB compliance: complete or section(s) applied,
• remarks,
• compliance date,
FALCON 900 F900 -485
January 16, 2023 F900 -30-13
Initial issuance Page 3 / 6
DASSAULT AVIATION Proprietary Data

### Page 6

• service center.
FALCON 900 F900 -485
January 16, 2023 F900 -30-13
Initial issuance Page 4 / 6
DASSAULT AVIATION Proprietary Data

### Page 7

3. MATERIAL INFORMATION
NOTE: Compliance with this Service Bulletin by substituting the part numbers below with interchangeable
subsequent part numbers (as per the Master List) is acceptable, provided that subsequent part
numbers have the same effectivity as the original ones.
A. LOCAL PROCUREMENT
In case of replacement:
• Wiggins coupling P/N W991-24CE
• Seal P/N W932-24B
FALCON 900 F900 -485
January 16, 2023 F900 -30-13
Initial issuance Page 5 / 6
DASSAULT AVIATION Proprietary Data

### Page 8 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900  F900 -485
A/C WITH SB F900-031 OR M767
RIB1
RIBB
L501HJ/R501HJ
L502HJ/R502HJ
Figure 1: LOCATION OF WING ANTI-ICING WIGGINS COUPLINGS
January 16, 2023  END OF DOCUMENT  F900-30-13
Initial issuance  Page 6 / 6

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