# Dassault Service Bulletin F900EX-285: Revision 1

- Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2015-3629; AD 2016-19-13 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Dassault Service Bulletin F900EX-285](https://openairdocs.org/service-documents/dassault/f900ex-285.md)
- Title as filed: SBF900EX-285 R1
- Pages: 18
- PDF: https://openairdocs.org/files/sha256/4f/a7/4fa7786e1745bc89be527e48e59681796001d31eee976e8b152ef076d4f62b16
- Page: https://openairdocs.org/service-documents/dassault/f900ex-285/file/4fa7786e1745

## Text

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### Page 1

FALCON 900EX
FALCON 900EX EASy
FALCON 900DX
No 285-R1
JANUARY 26, 2015
MANDATORY
ATA 33-08
LIGHTING
EXTERIOR LIGHTING
ELECTRICAL BONDING OF WHELEN FIN TIP ANTI-
COLLISION LIGHT
FALCON SERVICE BULLETIN
Copyright © 2015 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.
573

### Page 2

LIGHTING
EXTERIOR LIGHTING
ELECTRICAL BONDING OF WHELEN FIN TIP ANTI-COLLISION LIGHT
Initial issuance July 18, 2007
List of effective pages :
1 to 15
Erratum September 09, 2007
List of effective pages :
1 to 15
List of modified pages :
8
Revision 1 January 26, 2015
List of effective pages :
1 to 14
List of modified pages :
1 to 11
REASON:The Service Bulletin is now rendered mandatory.
This revision is not applicable to aircraft already modified per the initial issuance of
this Service Bulletin.
FALCON 900EX F900EX -285
F900EX -33-08

### Page 3

LIGHTING
EXTERIOR LIGHTING
ELECTRICAL BONDING OF WHELEN FIN TIP ANTI-COLLISION LIGHT
 
1. PLANNING INFORMATION
A. EFFECTIVITY
This Service Bulletin is applicable to the following aircraft equipped with a WHELEN fin tip anti-
collision light (without SATCOM fairing):
• FALCON 900EX with serial numbers 1 through 195, equipped with a WHELEN fin tip anti-
collision light per Service Bulletin F900EX-25 (M1682), and (F900EX, F900EX-EASy), and
• FALCON 900EX with serial numbers 601 through 620 (F900DX).
B. REASON
The investigation conducted on a FALCON 2000 aircraft that had been struck by lightning has shown
that the electrical bonding of the fin tip anti-collision light may not be sufficient under certain
circumstances, potentially resulting in damaging the aircraft wiring.
The purpose of this Service Bulletin is to improve the electrical bonding of the FALCON 900EX and
FALCON 900DX fin tip anti-collision light whose installation is similar to the F2000.
C. DESCRIPTION
After removing the fin tip fairing, the operation consists of the following:
• to install an electrical bonding strip in two parts between the anti-collision light and a rib of the
fin,
• to modify the shield connection of the wiring,
• to modify the routing of the wiring.
D. COMPLIANCE
Mandatory:
• This Service Bulletin is rendered mandatory by EASA Airworthiness Directive No. 2015-0006.
• As prescribed by the Airworthiness Authorities of the country of registration of the aircraft.
E. APPROVAL
This Service Bulletin covers DASSAULT AVIATION modification F900EX M5381 that has been
approved under the authority of DOA nr. EASA.21J.051.
The technical content of this document is approved under the authority of DOA nr. 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.
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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:
• CANADA and U.S.A.: 1-800-800-4036
• MEXICO: 001-800-800-4036
• Other countries: 1-201-541-4809
Fax:
• CANADA and U.S.A.: 1-800-800-4817
• MEXICO: 001-800-800-4817
• Other countries: 1-201-440-7021
Other continents: DASSAULT AVIATION
Falcon Spares
BOITE POSTALE N°101
AEROPORT DU BOURGET
93350 - LE BOURGET Cedex (FRANCE)
Please contact your Dassault Aviation
Account Representative
Telephone: 33 (0)1.48.35.56.78
Fax: 33 (0)1.48.35.56.00
E/H dafsorder@dassault-aviation.com
Price and availability on request.
H. TOOLING - PRICE AND AVAILABILITY
Normal maintenance tooling.
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)
• PRINCIPLES AND CHECK OF THE ELECTRICAL BONDING (Refer to TASK
20-20-00-910-801)
• OPERATIONAL TEST OF THE EXTERIOR LIGHTING (Refer to TASK 33-40-00-710-801)
Illustrated Parts Catalog:
• ANTI-COLLISION LIGHTS (Refer to IPC fig. 33-40-10-50)
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DASSAULT AVIATION Proprietary Data

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• VERTICAL STABILIZER FIN TIP (Refer to IPC fig. 55-30-40-10)
Service Bulletin F200EX-25 "Lights - Navigation lights - Replacement of fin anti-collision light"
K. OTHER PUBLICATIONS AFFECTED
The following publications will be revised at a later date to account for the changes introduced by this
Service Bulletin:
• Illustrated Parts Catalog.
• Maintenance Manual.
• Wiring Manual.
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2. ACCOMPLISHMENT INSTRUCTIONS
A. PRELIMINARY STEPS
(1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801).
(2) Remove the screws attaching upper fin tip fairing ( 322A) (Refer to IPC fig. 55-30-40-10 , item 10).
(3) Disengage upper fin tip fairing (322A), disconnect connector (322P) and remove upper fin tip
fairing (322A).
(4) Removal of the light unit assembly (Refer to IPC fig. 33-40-10-50):
• Remove the PR bead coating the retainer (item 150) without removing the flexible gasket
located underneath.
• Remove the retainer, glass cover and seal (items 150, 180 and 190).
• Remove the light unit assembly (screws item 110).
NOTE: Remove and discard gasket (item 210) if installed.
B. ANTI-COLLISION LIGHT ELECTRICAL BONDING
In accordance with fig. 1:
(1) Cut out the run outs of the compound seal to obtain a plane mounting surface.
(2) Set the mounting-base bonding strip (item 1), equipped with plate (item 8), into place on the
fairing. Attach with two screws.
(3) Fold the tab of the strip to a 90° angle with respect to the fairing’s rib.
(4) Pin the strip assembly (items 2 and 3) to the fairing.
(5) Position the strip assembly (items 2 and 3) in contact against the RH side panel of the fairing and
on strip (item 1). If necessary, rework the shape of the strips to obtain proper contact.
(6) Remove the strip assembly (items 2 and 3).
(7) Install double-sided adhesive tape on the face coming in contact with bonding strip (item 1).
(8) Re-install strip assembly (items 2 and 3). Pin to hold in contact against the fairing.
(9) Install strip (item 1) over the strip assembly, pressing firmly at the contact area.
(10) Remove the strip assembly (items 1, 2 and 3).
(11) Counterdrill bonding strip (item 2) to a diameter of 0.1 in (2.5 mm). Disconnect the strips and
discard the adhesive tape, remove all remaining adhesive.
(12) Enlarge the holes drilled in the strips to a diameter of 0.126 in (3.2 mm). Assemble bonding strips
(items 1 and 2) using rivets (item 4). Coat the faces of the strips with covering sealant making a
bead at the contour edge with bead sealant.
(13) Clean the contact surfaces of the light unit assembly, of the strips, and of the fairing using MEK.
(14) Coat the strip assembly (items 2 and 3) with interlaying sealant.
(15) Connect and safety connector (4LX) to the light unit.
(16) Set the strip assembly and the light unit assembly into place in the fairing and attach the light
assembly to the fairing. Smooth out the PR in excess around the strips.
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DASSAULT AVIATION Proprietary Data

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(17) Use a shim to wedge strip assembly (items 2 and 3) in contact against the fairing’s wall. Allow to
cure.
(18) Temporarily position the fairing at the fin tip and mark the location of strip (item 3).
(19) Strip the paint off the fin tip rib at the location marked for strip (item 3). Protect the stripped area
with alodine.
(20) Install the retainer, glass cover and sealthe gasket, the lens, and the retainer plate (Refer to IPC
fig. 33-40-10-50 , items 190, 180 and 150).
(21) Apply a bead sealant around the attaching plate.
C. MODIFYING THE WIRING
Modify the shield connection in accordance with instructions depicted hereafter and using:
• fig. 2 on aircraft with serial numbers 1, 12 and subsequent (modification F900EX M1682 factory
applied),
• fig. 3 on aircraft with serial numbers 2 through 11 if SB F900EX-25 if applied.
Dimension A:
• Connector with front extraction: 1.38 in (35 mm).
• Connector with rear extraction: 1.97 in (50 mm).
Self-soldering sleeves must be staggered at the extremity of the wiring assemblies so as to prevent a
bulge on the bundle.
INSTALLING SELF-SOLDERING SLEEVES
• After stripping the shielded cable and the ground lead wire, unwind the shielding braid of cable
without overlapping the shielding strands.
• Position the self-soldering sleeve on the stripped part of the cable.
• Insert the stripped part of the ground lead wire on the inside of the solder preform. Make sure
that the ground lead wire is installed against the guide provided for this purpose.
• With hot air or infrared generator equipped with an appropriate reflector, start heating the small
diameter of the self-soldering sleeve, then move up to the solder preform until it melts and flows.
FALCON 900EX F900EX -285
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DASSAULT AVIATION Proprietary Data

### Page 8

Complete the operation on the large side of the self-soldering sleeve. It is recommended to
position the solder preform at a 90° angle maximum in relation to the heat source. The solder
must always be visible to the operator.
• The insulating sheath of the shielded cable must not be blistered nor burnt.
D. RE-ROUTING THE WIRING WITH WIRING ROUTED OVER RIB 2
In accordance with fig. 4:
(1) Remove the WHELEN light unit assembly.
(2) Drill a 0.19 in (4.9 mm) diameter hole through the rib of the fairing.
(3) Install new clamping stud (item 5) on rib 3.
(4) Unclamp the wiring from rib 2.
(5) Clamp the wiring to rib 3.
(6) Connect connector (4LX) to the WHELEN light.
(7) Attach the light unit assembly to the fairing.
(8) Install the gasket, the glass cover, and the retainer (Refer to IPC fig. 33-40-10-50  , items 180,
190, 260).
(9) Apply bead sealant around the retainer.
E. RE-ROUTING THE WIRING WITH WIRING ROUTED AROUND THE BACK OF FAIRING
In accordance with fig. 5:
(1) Remove the WHELEN light unit assembly.
(2) Drill a 0.19 in (4.9 mm) diameter hole through the rib 3 of the fairing.
(3) Install new clamping stud (item 5) on rib 3.
(4) Remove contacts from connector (4LX).
(5) Adjust the wiring length for proper re-routing in accordance with fig. 5.
(6) Fit the cut wires with new contacts and insert them into connector (4LX).
(7) Clamp the wiring to rib 3.
(8) Connect connector (4LX) to the WHELEN light.
(9) Attach the light unit assembly to the fairing.
(10) Install the gasket, the glass cover, and the retainer (Refer to IPC fig. 33-40-10-50  , items 180,
190, 260).
(11) Apply bead sealant around the retainer.
F. FINAL STEPS
(1) Use a permanent ink pen to record the number of this Service Bulletin on "Service Bulletin
Compliance" label (item 7).
(2) Use interlaying sealant to bond the "Service Bulletin Compliance" label (item 7) to the inner skin
of the fairing next to the P/N.
(3) Place the fairing on the fin tip, connect connector (322P) and attach the fairing.
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DASSAULT AVIATION Proprietary Data

### Page 9

(4) Measure the electrical bonding across the anti-collision light base plate and the reference point
located in the mechanic’s servicing compartment (Refer to TASK 20-20-00-910-801).
The measured value must not exceed 2 mΩ.
(5) Perform the operational test of the upper anti-collision light (Refer to TASK 33-40-00-710-801).
G. RECORDING
Record compliance with this Service Bulletin in the appropriate aircraft documents.
Fill out the card located at the end of the Service Bulletin and mail or fax it to Dassault Aviation or
Dassault Falcon Jet, or fill out the electronic Service Bulletin reply form located in the ”Service Bulletin"
page on the Falcon portal.
FALCON 900EX F900EX -285
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DASSAULT AVIATION Proprietary Data

### Page 10

3. MATERIAL INFORMATION
A. MODIFICATION KIT
KIT P/N SBF900EX0285A
(1) Mechanical kit
KIT P/N SBF900EX0285A - Mechanical kit
NEW P/N
Q
T
Y
KEY WORD INSTRUCTIONSDISPOSITION ITEMFIG
FGFB319100010 1 Mounting-base bonding
strip Supply already assembled
- (1-fig. 1) -
FGFB319100038 1 Shim - (8-fig. 1) -
FGFB319100036 1 Strip
Supply already assembled
- (2-fig. 1) -
FGFB319100037A1 1 Strip - (3-fig. 1) -
NAS1919M04S02WU 3 Rivet - (4-fig. 1) -
78753 1 Studded support - (5-fig. 4) - (5-fig. 5)
78750-02 1 Clamp - (6-fig. 4) - (6-fig. 5)
79160 1 "Service Bulletin
Compliance" label
- (7-fig. 1) -
(2) Electrical kit
KIT P/N SBF900EX0285A - Electrical kit
NEW P/N
Q
T
Y
KEY WORD INSTRUCTIONSDISPOSITION FIG
01EQTC0S20-05-119-18 1 Lug Ground 322J - fig. 2 - fig. 3 -
01C0K302-16S01 1 Contact Ground 322J - fig. 2 - fig. 3 -
01CAN210-1-20 1 #20 gauge wire L= 3.3 ft (1 m) Ground 322J - fig. 2 - fig. 3 -
01C0A54143FC16 4 Blanking pin 322J/P - fig. 2 - fig. 3 -
01EQTRB23-2R 1 Self-soldering sleeve 4LX - fig. 2 - fig. 3 -
01CAN210-1-22 1 #22 gauge CF wire L = 1 ft (0.3 m) - See
NOTE 1
4LX - fig. 2 - fig. 3 -
01CAN203-1-22Y 1 #22 gauge KZ wire L = 1 ft (0.3 m) - See
NOTE 2
4LX - fig. 2 - fig. 3 -
01EQTC0S20A03-071-22 1 Lug 4LX - fig. 2 - fig. 3 -
01C0K345-16S01 2 Contact 4LX - fig. 2 - fig. 3 -
FALCON 900EX F900EX -285
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DASSAULT AVIATION Proprietary Data

### Page 11

KIT P/N SBF900EX0285A - Electrical kit
NEW P/N
Q
T
Y
KEY WORD INSTRUCTIONSDISPOSITION FIG
01EQTEC1-1 1 Insulating sleeve 322P - fig. 2 - fig. 3 -
01EQTEC1-1 4 Insulating sleeve - See NOTE 3
01EQTPRL08B01 1 Splice - See NOTE 3
GND322J-B 2 Black sleeve with white marking
01PR0TMS3-32BK
322J - fig. 2 - fig. 3 -
GND312J-B 2 Black sleeve with white marking
01PR0TMS3-32BK
312J - fig. 2 - fig. 3 -
A 1 Black sleeve with white marking
01PR0TMS3-32BK
4LX - fig. 2 - fig. 3 -
B 1 Black sleeve with white marking
01PR0TMS3-32BK
4LX - fig. 2 - fig. 3 -
78750-01 5 Clamp 4LX - fig. 2 - fig. 3 -
NOTE 1: Use on FALCON 900EX S/N 1 through 136 and 138 through 140.
NOTE 2: Use on FALCON 900EX S/N 137, 141 and subsequent, and FALCON 900DX.
NOTE 3: Do not use on FALCON 900EX and FALCON 900DX.
B. LOCAL PROCUREMENT
As indicated in Consumable Products Manual (CPM):
• alodine.
• interlaying sealant.
• bead sealant.
• MEK or equivalent.
• covering sealant.
• Green CELOMER varnish 6060B.
• Locking wire.
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DASSAULT AVIATION Proprietary Data

### Page 12 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -285
Joggle
Make a lay of bead
sealant arround edge
Coat the 2 faces of
strips with covering sealant
Base plate  Light  PR bead
Light  90°
unit
assembly
VIEW B
(Inside fairing RH side)
VIEW A
Rib 3
*
Clean strip mounting area on fin rib.  Bond strips (items 2 and 3) to
Protect with Alodine.  RH side of fairing with
interlaying sealant
Figure 1: ELECTRICAL BONDING STRIPS INSTALLATION
January 26, 2015  F900EX -33-08
Revision 1  Page 10 / 14

### Page 13 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -285
AIRCRAFT F900EX S/NS 1, 12 THROUGH 195
AIRCRAFT F900DX 601 THROUGH 620
(MODIFICATION F900EX M1682 FACTORY APPLIED)
BEFORE SB
4LX
54FT
33420005 R32SPA  33420171
FLASH
33420176
•/ 33420172
122  150W
RED
AFTER SB
4LX
54FT
33420005  R32SPA  33420171
FLASH
33420176
GND322J-B
/20
150W
RED
AIRCRAFT F900EX S/NS 1,
12 through 136 and 138 through 140
4LX
AIRCRAFT F900EX S/NS 137,
141 and subsequent
F900DX 601 and subsequent
01CAB210-2-20  R  01CAB211-2-20  R
W  B  W  B
/22CF  /22KZ
Figure 2: AIRCRAFT F900EX S/NS 1, 12 THROUGH 195 - AIRCRAFT F900DX 601 THROUGH 620
(MODIFICATION F900EX M1682 FACTORY APPLIED)
January 26, 2015  F900EX -33-08
Revision 1  Page 11 / 14

### Page 14 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -285
BEFORE SB
33420033  322  4LX-  4LX
B
150W RED
SP322J-B
4LX-B
33420071  PLUG
C
I STRE LIGHT  STROBE LIGHT
FIN TIP
4LX
AFTER SB
01CAB210-2-20  R
/22CF
33420033  322  4LX-A  4LX
R
B
150W RED
4LX-B
PLUG  B
C
-I FIN RED ANTICOL.  STROBE LIGHT
FIN TIP
Figure 3: AIRCRAFT F900EX S/NS 2 THROUGH 11 WITH SB F900EX-25 APPLIED GND322J-B
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### Page 15 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -285
Old routing of Whelen light wiring
Rib 2  Rib 3
New routing of Whelen light wiring  (5)  X6)
View F
Drill 0.19 (4.9 mm) diameter
hole for installation of stud
(item 5)
1.57 in  (40 mm)
Existing drilled hole
Figure 4: RE-ROUTING THE WIRING - AIRCRAFT WITH WIRING ROUTED OVER RIB 2
January 26, 2015  F900EX -33-08
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### Page 16 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -285
Anti-collision light
New routing of Whelen light wiring
Old routing
of Whelen
light wiring
Drill 0.19 in (4.9 mm) diameter  View F
hole for installation of stud
(item 5)
1.57 in  (40 mm)
Existing drilled hole
Figure 5: RE-ROUTING THE WIRING - AIRCRAFT WITH WIRING ROUTED AROUND THE BACK OF
FAIRING
January 26, 2015  END OF DOCUMENT  F900EX -33-08
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### Page 17 (OCR)

NO POSTAGE
NECESSARY
FROM  IF MAILED
IN THE
UNITED STATES
ZIP CODE
BUSINESS REPLY MAIL
FIRST CLASS MAIL PERMIT NO. 3306 HACKENSACK, NJ 07602
POSTAGE WILL BE PAID BY ADDRESSEE:
DASSAULT FALCON JET CORP.
PO BOX 1946
SO HACKENSACK NJ 07606-9946
ATTENTION:
FIELD SERVICE DEPARTMENT
DASSAULT AVIATION
78, Quai Marcel Dassault
Cedex 300
92552 SAINT-CLOUD Cedex
FRANCE
A l'attention de DSC

### Page 18

SERVICE BULLETINS COMPLIANCE FALCON 900EX A/C S/N    
DASSAULT AVIATION Number  ATA Number   
F900EX 285  F900EX 33 08   
        
        
        
        
Coding: C complete compliance
 
T partial compliance
   
Performed by:   
Remarks: Revision 1 Date: Signature:
SERVICE BULLETINS COMPLIANCE
Would you be kind enough to inform us that this Service Bulletin is complied with:
- For "Western Hemisphere", mail upper card (No postage necessary if mailed in the U.S.A.) or fax to Dassault Falcon Jet: 1-201-541-4700.
- For "Other Continents", mail card herebelow or fax to Dassault Aviation: 33 (0)1.47.11.65.21.
On the occasion, if other Service Bulletins have been simultaneously complied with could you complete the blank spaces provided for this
purpose.
APPLICATION DE BULLETINS DE SERVICE
Lorsque vous aurez applique ce Bulletin de Service sur votre avion, veuillez avoir l'amabilite de nous en informer:
- Utiliser la carte reponse superieure pour continent americain (Dispensee de timbrage pour postage depuis les U.S.A.) ou le fax pour
Dassault Falcon Jet : 1-201-541-4700.
- Ou la carte reponse inferieure pour autres continents ou le fax pour Dassault Aviation : 33 (0)1.47.11.65.21.
Eventuellement, si d'autres Bulletins de Service ont ete appliques simultanement, vous pouvez les mentionner dans les cases vierges
prevues a cet effet.
APPLICATION DES BULLETINS DE SERVICE   
SERVICE BULLETINS COMPLIANCE FALCON 900EX A/C S/N    
DASSAULT AVIATION Number
Numero DASSAULT AVIATION  
ATA Number
Numero ATA   
F900EX 285  F900EX 33 08   
        
        
        
        
Coding: C complete complianceapplication totale
 
T partial complianceapplication partielle
   
Performed by:
Fait par:
  
Remarks: Revision 1 Date: Signature:
Remarques: Revision 1

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