# Dassault Service Bulletin F900EX-305: 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-305](https://openairdocs.org/service-documents/dassault/f900ex-305.md)
- Title as filed: SBF900EX-305 R1
- Pages: 17
- PDF: https://openairdocs.org/files/sha256/1a/92/1a92a7e2018de7c9a728f34b5f9a42072c0cc89da3fd50a51f8a81efd142ddda
- Page: https://openairdocs.org/service-documents/dassault/f900ex-305/file/1a92a7e2018d

## Text

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### Page 1

FALCON 900EX
FALCON 900EX EASy
FALCON 900DX
No 305-R1
JANUARY 26, 2015
MANDATORY
ATA 33-10
LIGHTING
EXTERNAL LIGHTS
IMPROVED ELECTRICAL BONDING OF WHELEN ANTI-
COLLISION LIGHT TO THE S-DUCT COWL
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
EXTERNAL LIGHTS
IMPROVED ELECTRICAL BONDING OF WHELEN ANTI-COLLISION LIGHT TO THE S-
DUCT COWL
Initial issuance September 19, 2007
List of effective pages :
1 to 13
Erratum November 21, 2008
List of effective pages :
1 to 13
List of modified pages :
3, 4 and 7
Revision 1 January 26, 2015
List of effective pages :
1 to 13
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 -305
F900EX -33-10

### Page 3

LIGHTING
EXTERNAL LIGHTS
IMPROVED ELECTRICAL BONDING OF WHELEN ANTI-COLLISION LIGHT TO THE S-
DUCT COWL
 
1. PLANNING INFORMATION
A. EFFECTIVITY
This Service Bulletin is applicable to:
• F900EX aircraft with serial numbers 1 through 195 (F900EX, F900EX EASy),
• F900EX aircraft with serial numbers 601 through 620 (F900DX),
equipped with a WHELEN anti-collision light on S-duct front upper fairing  (353AT) (A/C with fin tip
SATCOM fairing).
B. REASON
The electrical bonding of the WHELEN anti–collision light installed on Engine No. 2 S–duct is currently
provided at the junction connector. The bonding value may not be sufficient in case of lightning strike.
The purpose of this Service Bulletin is to improve the anti-collision light bonding in order to make the
light installation more resistant to damage in case of a lightning strike.
C. DESCRIPTION
The operation consists in:
• removing S-duct front upper fairing (353AT),
• installing a bonding strip between the anti-collision light and a fuselage pick-up rib.
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 M5386 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.
G. MATERIAL - PRICE AND AVAILABILITY
The modification kit may be obtained from either address listed below:
FALCON 900EX F900EX -305
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DASSAULT AVIATION Proprietary Data

### Page 4

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 VHF COMMUNICATION SYSTEM (Refer to TASK
23-11-00-710-802)
• OPERATIONAL TEST OF THE EXTERIOR LIGHTING (Refer to TASK 33-40-00-710-801)
• REPLACEMENT OF UPPER ANTI-COLLISION LIGHT BULB (WHELEN) (Refer to TASK
33-40-09-960-801)
Structural Repair Manual:
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DASSAULT AVIATION Proprietary Data

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• INSTALLATION OF SHUR-LOK BLIND TYPE INSERT (Refer to SRM 51-40-05)
K. OTHER PUBLICATIONS AFFECTED
The following publication is revised to account for the changes introduced by this Service Bulletin:
• Illustrated Parts Catalog.
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DASSAULT AVIATION Proprietary Data

### Page 6

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 securing S-duct front upper fairing (353AT).
(3) Disengage S-duct front upper fairing (353AT) from the rib.
(4) If installed, disconnect VHF 1 antenna (L5RC) (connector 691P), located at the front on the LH
side.
(5) Disconnect upper anti-collision light (4LX).
(6) Remove S-duct front upper fairing (353AT).
(7) Protect the connectors with caps/lugs.
B. ELECTRICAL BONDING OF THE ANTI–COLLISION LIGHT
(1) As per Maintenance Manual (Refer to TASK 33-40-09-960-801):
• Remove the sealant embedding retainer (item 2) without removing the flexible seal located
under it.
• Remove the retainer, glass cover and seal (items 2, 3 and 4).
• Remove the anti–collision light housing.
NOTE: Discard the seal if installed between the housing and S-duct front upper fairing (353AT).
(2) As per fig. 1, fig. 2 and fig. 3:
(a) From S-duct front upper fairing (353AT) LH side, remove the two fittings attaching the anti–
collision light pick-up plate blending with strip (1-fig. 3).
(b) Install baseplate strip (item 1) on S-duct front upper fairing (353AT): drill a hole centered on
the hole drilled for the attachment of S-duct front upper fairing (353AT), and joggle to
abutment against the lower reinforcement.
(c) For A/C with Service Bulletin F900EX-19 (M1947) applied, slightly bend the strip at the plate
to allow the plate to fit flat against S-duct front upper fairing (353AT).
(d) Keep the strip applied against S-duct front upper fairing ( 353AT).
(e) Counterbore S-duct front upper fairing ( 353AT) to dia. 0.1 in (2.5 mm) in accordance with the
strip and pin-rig.
(f) Joggle strip (item 1) at the anti-collision light pick-up plate.
(3) For A/C with modification F900EX M3541 (F900EX S/N 141 through 195 and F900DX S/N 601
through 620) applied (riveted anti-collision light pick-up plate):
(a) Drill strip (item 1) to dia. 1/8 in (3.2 mm) in accordance with the two pick-up holes of the
plate.
(b) Remove the strip.
(c) Drill a new hole in the strip to dia. 0.1 in (2.5 mm) for additional attachment fitting (item 4).
(d) Pin the strip to the pick-up plate.
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DASSAULT AVIATION Proprietary Data

### Page 7

(e) Counterbore the new hole drilled in the strip, in the plate and S-duct front upper fairing
(353AT).
(f) Drill the three elements to dia. 0.157 in (4 mm).
(g) Remove strip (item 1).
(h) Countersink S-duct front upper fairing (353AT) for rivet (4-fig. 3).
(4) For A/C with Service Bulletin F900EX-19 (M1947) applied (attachment of anti-collision light pick-
up plate with screws and inserts):
(a) Draw the outline of strip (item 1) on the pick–up plate.
(b) Remove strip (item 1).
(c) Remove the pick–up plate and the sealant.
(d) In the plate, drill a new hole to dia. 0.1 in (2.5 mm) for the additional attachment fitting (item
6).
(e) Position the plate on S-duct front upper fairing (353AT) and mark the location of the new
hole.
(f) Place insert (item 6) (Refer to SRM 51-40-05).
(g) Drill the new hole to dia. 0.2 in (5 mm) in the pick-up plate.
(h) Position strip (item 1) on the pick-up plate in accordance with the previously drawn outline.
Drill the strip in accordance with the three holes drilled in the pick-up plate.
(i) Secure the pick-up plate, except at the three strip pick-up locations, with interlaying
sealant. Place bead sealant at the mating area with S-duct front upper fairing (353AT).
(5) As per fig. 3, fig. 4 and fig. 5:
(a) Pin strip (item 1) to the pick-up plate (screws or pins).
(b) Pin strip (item 1) to S-duct front upper fairing (353AT).
(c) One at a time, drill the pick-up holes of the strip and S-duct front upper fairing (353AT) to dia.
0.2 in (5 mm), at the location of screws (item 2), and pin-rig as the operation proceeds to
provide a satisfactory resting base.
(d) Remove the strip.
(e) Drill the lower hole of the strip to dia. 0.2 in (5 mm).
(f) Remove the honeycomb from each hole drilled in S-duct front upper fairing (353AT) over a
dia. of 0.71 in (18 mm).
(g) Completely fill the holes in S-duct front upper fairing (353AT) with epoxy resin . Allow to
cure.
(h) Re-drill and countersink for screws (2-fig. 4).
(6) As per fig. 3:
(a) Strip the paint from the upper surface of the anti-collision pick-up plate at the level of the
housing installation plane.
(b) Strip the paint from the lower surface of the anti-collision pick-up plate at the level of the
mating plane of strip (item 1).
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DASSAULT AVIATION Proprietary Data

### Page 8

(c) Protect the stripped parts with alodine.
(7) Clean the resting faces of the housing, the strip and S-duct front upper fairing (353AT) with MEK.
(8) Apply interlaying sealant  on the face of strip (item 1) resting on S-duct front upper fairing
(353AT).
NOTE: Do not cover the part resting on the pick–up plate.
(9) As per (fig. 2) and (fig. 4), secure the strip to S-duct front upper fairing (353AT) with screws and
nuts (items 2 and 3). Smooth the excess sealant at the periphery of the strip and cover the nuts
with covering sealant.
(10) Attachment of strip (item 1) to the pick–up plate (fig. 3):
(a) Remove any sealant seeping in between the two elements.
(b) For A/C with Service Bulletin F900EX-19 (M1947) applied, secure the assembly on S-duct
front upper fairing (353AT) with removed screws and washers (items 6 and 7).
(c) For A/C with modification F900EX M3541 (F900EX S/N 141 through 195 and F900DX S/N
601 through 620) applied, secure the assembly to S-duct front upper fairing (353AT) with
rivets (item 4) and interlaying sealant under the rivet heads.
(d) Apply bead sealant to the periphery of the strip.
(11) Modification of the fuselage rib (fig. 2):
(a) Mark the location of the hole picking up the strip on the rib.
(b) Remove the sealant and the paint from the marked area.
(c) Protect the stripped area with alodine.
C. FINAL STEPS
(1) Secure the anti-collision light housing to S-duct front upper fairing (353AT).
(2) Install the seal, the glass cover and the retainer.
(3) Apply bead sealant around the attachment plate.
(4) Using indelible ink, inscribe “SB 305” on "Service Bulletin Compliance" label (8-fig. 1).
(5) Using interlaying sealant, bond the "Service Bulletin Compliance" label to the internal skin of S-
duct front upper fairing (353AT) in the vicinity of the reference (fig. 1).
(6) Position S-duct front upper fairing (353AT) on the fuselage.
(7) Connect and safety upper anti-collision light (4LX) to the housing.
(8) If installed, connect VHF 1 antenna (L5RC).
(9) Install S-duct front upper fairing (353AT).
(10) Measure bonding value between the anti–collision light baseplate and the reference test point in
the mechanic’s servicing compartment (Refer to TASK 20-20-00-910-801).
The value should be equal to 2.5 mΩ max.
(11) Perform the operational test of the upper anti-collision light (4LX) (Refer to TASK
33-40-00-710-801).
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DASSAULT AVIATION Proprietary Data

### Page 9

(12) Perform the operational test of the VHF1 system (Refer to TASK 23-11-00-710-802 ) if VHF1
antenna installed on S-duct front upper fairing (353AT)
D. 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.
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DASSAULT AVIATION Proprietary Data

### Page 10

3. MATERIAL INFORMATION
A. MODIFICATION KIT
KIT P/N SBF900EX0305A
NEW P/N QTY KEY WORD
ITEM
FIG
FGFB823675330A1 1 Bonding strip
FGFB823675330A1 1 Bonding strip Refer to (1-fig. 1)
NAS1153V4A 5 Screw Refer to (2-fig. 4)
HW17-3DF 5 Nut Refer to (3-fig. 4)
NAS1921M05S03WU 3 Rivet Refer to (4-fig. 3)
SL644M5-3 1 Insert Refer to (5-fig. 3)
22208TX050006XA 1 Screw Refer to (6-fig. 3)
23111DG050A 1 Washer Refer to (7-fig. 3)
79160 1 "Service Bulletin Compliance" label Refer to (8-fig. 1)
B. LOCAL PROCUREMENT
As indicated in Consumable Products Manual (CPM):
• alodine
• bead sealant
• covering sealant
• interlaying sealant
• MEK
• epoxy resin
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DASSAULT AVIATION Proprietary Data

### Page 11 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -305
ENGINE No. 2
AIR INTAKE
Upper anti-collision light (4LX)
VHF1 antenna (if installed) (L5RC)
353AT
353AT REMOVED
INSIDE VIEW
LH SIDE
RH SIDE
See figure 3
Connector
See figure 2  691P
Figure 1: GENERAL VIEW
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### Page 12 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -305
View A (see figure 1)
Fr30  Fr29  Bead sealant
on baseplate
periphery
4444
*****
Cross-section CC
see figure 4  Interlaying sealant on 353AT
Cross-section DD
see figure 5
Joggling
(701)  (161)  (704)  (701)
(X0()  Remove sealant and
strip paint from rib
Cross-section EE
1.46 in  1.46 in
(37 mm)  (37 mm)
Figure 2: VIEW A
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### Page 13 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -305
View B (see figure 1)
A/C with M3541 (F900EX S/N 141 through 195 and F900DX S/N 601 through 620)
Lower side of stripped plate
Bead sealant
Upper side of
stripped plate
Anti-collision light
Additional attachment  pick-up plate
fitting
View B (see figure 1)
A/C with SB F900EX-19 or M1947
5(6)7  Lower side of stripped plate
Additional
attachment
fitting
Bead sealant
Upper side of
stripped plate
Anti-collision light
pick-up plate
Figure 3: VIEW B
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### Page 14

Figure 4: CROSS-SECTION CC
FALCON 900EX F900EX -305
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### Page 15 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 900EX  F900EX -305
Cross-section DD (see figure 2)
A/C with M3541 (F900EX S/N 141 through 195 and F900DX S/N 601 through 620)
Fill with bead sealant  No sealant
To be joggled upon
positioning
Cross-section DD (see figure 2)
A/C with SB F900EX-19 or M1947
Fill with bead sealant  No sealant
To be joggled upon
positioning
Figure 5: CROSS-SECTION DD
January 26, 2015  F900EX -33-10
END OF DOCUMENT
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### Page 16 (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 17

SERVICE BULLETINS COMPLIANCE FALCON 900EX A/C S/N    
DASSAULT AVIATION Number  ATA Number   
F900EX 305  F900EX 33 10   
        
        
        
        
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 305  F900EX 33 10   
        
        
        
        
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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