# FALCON 7X

No 284-R1 APRIL 08, 2014 

# MANDATORY

ATA 53 FUSELAGE

INSPECTION OF THE FUEL BOXES 

# FALCON SERVICE BULLETIN

Copyright © 2014 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.



### 785

### FUSELAGE
INSPECTION OF THE FUEL BOXES

Initial issuance September 12, 2013 List of effective pages : 1 to 9

Erratum October 16, 2013 List of effective pages : 1 to 9 List of modified pages : 9 REASON: Dimensions on figure 2 corrected.

Revision 1 April 08, 2014 List of effective pages : 1 to 11 List of modified pages : 4, 5, 6, 7 and 10 REASON: The purpose of this revision is to suppress a documentation discrepancy that may

cause an improper application of bead sealant. This revision is applicable to aircraft which have already implemented the initial issuance of this Service Bulletin , except aircraft with serial number 157

. 

# FALCON 7X 7X -284

ATA 53

### FUSELAGE
INSPECTION OF THE FUEL BOXES

1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to FALCON 7X aircraft with serial numbers from 2 through 140, 142 through 176, 178 to 181, 183, 184, 187, 188, 190, 194 and 200. B. REASON A fuel leak has been noted on one aircraft before delivery, in the area of the fuel box located in the baggage compartment. The purpose of this Service Bulletin is to check the installation and the sealing of the fuel boxes. C. DESCRIPTION This operation consists in: • Removing a half shell from each fuel box, • Checking for absence of fuel leak, • Checking the draining hole, • Renewing the sealant application when closing the half shell. D. COMPLIANCE Mandatory:

• It is anticipated that this Service Bulletin will be rendered mandatory by an EASA Airworthiness Directive. • 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 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 which may be performed on this occasion. G. MATERIAL - PRICE AND AVAILABILITY The modification kit may be obtained from either address listed below: 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 1 / 11DASSAULT AVIATION Proprietary DataWestern 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 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 Illustrated Parts Catalog: • (Refer to IPC fig. 21-72-10-25 ) • (Refer to IPC fig. 21-72-40-05 ) • (Refer to IPC fig. 53-50-10-20 ) • (Refer to IPC fig. 54-50-30-10 ) Aircraft Maintenance Manual: • GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801 ) • ELIMINATION OF FUEL LEAKS (Refer to TASK 20-32-00-360-802 )

• REMOVAL / INSTALLATION OF THE BAGGAGE COMPARTMENT LININGS ( Refer to TASK 25-52-01-900-801 ) 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 2 / 11DASSAULT AVIATION Proprietary Data• OPENING / CLOSING OF THE BAGGAGE COMPARTMENT DOOR ( Refer to TASK 52-30-00-860-801 ) 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 3 / 11DASSAULT AVIATION Proprietary Data2. ACCOMPLISHMENT INSTRUCTIONS FOR AIRCRAFT WHICH HAVE ALREADY IMPLEMENTED THE

INITIAL ISSUANCE OF THIS SERVICE BULLETIN A. PRELIMINARY STEPS (1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801 ). (2) Open the baggage compartment door ( BAG ) (Refer to TASK 52-30-00-860-801 ). (3) Remove the pylon front lower access panel No.1 ( 431AB ) and the pylon front lower access panel No.1 ( 441AB ) (Refer to IPC fig. 54-50-30-10 , items 10A et 20A). (4) Remove the FR. 33 - FR. 36 lower lining ( 271CZ ) and the FR. 33 - FR. 36 lining ( 272CZ ) (Refer to TASK 25-52-01-900-801 ) to gain access to the fuel boxes ( Refer to IPC fig. 53-50-10-20 , items 420 and 500). (5) Aircraft with humidifier system: (a) Disconnect the draining pipe ( Refer to IPC fig. 21-72-40-05 , item 330 ) from the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (b) Remove the humidifier receiver (Refer to IPC fig. 21-72-10-25 , item 150). (c) Remove the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (6) Remove the thermo-acoustic insulation around the fuel box working areas. B. PROCEDURE NOTE: This procedure is valid for the LH and the RH fuel boxes. The illustrations show either one or the other. (1) Half shell removal CAUTION: RECORD THE LOCATION OF EACH ATTACHING PART BEFORE REMOVAL. (a) Remove all the attaching parts following fig. 1

. NOTE: On the LH and RH sides, remove the screws (x-fig. 1) before screws (y-fig. 1). (b) Note the orientation of the half shell using a soft-lead pencil. (c) Remove the half shell (A-fig. 1). (2) Removal of sealant (a) Remove the sealant: 1 On the removed half shell (A-fig. 1), using a Plexiglas spatula, 2 On the other half shell (B-fig. 1), from areas (C-fig. 1), using a Plexiglas spatula. 3 Perform a dipping on each half shell (A-B-fig. 1), using scotch brite then clean the areas with cleaner

. 4 On each screw head using cleaner

. (3) Check the drain hole (a) Make sure that the drain hole of each drain box (D-fig. 1) is not obstructed. (b) Make sure that the LH and RH pylon drain holes are not obstructed. 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 4 / 11DASSAULT AVIATION Proprietary Data(4) Preparation of the fuel box CAUTION: DO NOT OBSTRUCT THE DRAIN HOLE (D-FIG. 1) WHEN YOU APPLY SEALANT. (a) Apply bead sealanton the joggling areas fig. 1

. (b) Let the bead sealant cure. (c) Apply demolding agenton the areas (C-fig. 1) of the half shell (B-fig. 1). (d) Let the demolding agentdry for 5 minutes minimum. (e) Apply a second coat of demolding agenton the areas (C-fig. 1) of the half shell (B-fig. 1). (f) Let the demolding agentdry for 5 minutes minimum. (g) Apply bead sealanton the areas of the half shell (A-fig. 2). (5) Half shell installation (a) Position the half shell (A-fig. 2) on the other half shell (B-fig. 2). (b) Apply bead sealantunder each screw head. (c) Install all the removed attaching parts following the recorded locations and fig. 1

. NOTE: On the LH and RH sides, install the screws (y-fig. 1) before screws (x-fig. 1). (d) Torque each screw to 0.374 m.daN (33.10 lbf.in). (e) Wipe the excess bead sealant around each fuel box. C. FINAL STEPS (1) Install the removed thermo-acoustic insulations. (2) Aircraft with humidifier system: (a) Install the pipe receiver (Refer to IPC fig. 21-72-40-05 ). (b) Install the humidifier receiver (Refer to IPC fig. 21-72-10-25 , item 150). (c) Connect the draining pipe ( Refer to IPC fig. 21-72-40-05 , item 330 ) to the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (3) Install the FR. 33 - FR. 36 lower lining ( 271CZ ) and the FR. 33 - FR. 36 lining ( 272CZ ) ( Refer to TASK 25-52-01-900-801 ). (4) Close the baggage compartment door ( BAG ) (Refer to TASK 52-30-00-860-801 ). (5) Install the pylon front lower access panel No.1 ( 431AB ) and the pylon front lower access panel No.1 ( 441AB ) (Refer to IPC fig. 54-50-30-10 , items 10A et 20A). D. RECORDING Record compliance with this Service Bulletin in the appropriate aircraft documents. Fill out the electronic Service Bulletin reply form located in the ”Service Bulletin" page on the Falcon portal. 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 5 / 11DASSAULT AVIATION Proprietary Data3. ACCOMPLISHMENT INSTRUCTIONS FOR AIRCRAFT WHICH HAVE NOT IMPLEMENTED THE INITIAL

ISSUANCE OF THIS SERVICE BULLETIN A. PRELIMINARY STEPS (1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801 ). (2) Open the baggage compartment door ( BAG ) (Refer to TASK 52-30-00-860-801 ). (3) Remove the pylon front lower access panel No.1 ( 431AB ) and the pylon front lower access panel No.1 ( 441AB ) (Refer to IPC fig. 54-50-30-10 , items 10A et 20A). (4) Remove the FR. 33 - FR. 36 lower lining ( 271CZ ) and the FR. 33 - FR. 36 lining ( 272CZ ) (Refer to TASK 25-52-01-900-801 ) to gain access to the fuel boxes ( Refer to IPC fig. 53-50-10-20 , items 420 and 500). (5) Aircraft with humidifier system: (a) Disconnect the draining pipe ( Refer to IPC fig. 21-72-40-05 , item 330 ) from the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (b) Remove the humidifier receiver (Refer to IPC fig. 21-72-10-25 , item 150). (c) Remove the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (6) Remove the thermo-acoustic insulation around the fuel box working areas. B. PROCEDURE NOTE: This procedure is valid for the LH and the RH fuel boxes. The illustrations show either one or the other. (1) Half shell removal CAUTION: RECORD THE LOCATION OF EACH ATTACHING PART BEFORE REMOVAL. (a) Remove all the attaching parts following fig. 1

. NOTE: On the LH and RH sides, remove the screws (x-fig. 1) before screws (y-fig. 1). (b) Note the orientation of the half shell using a soft-lead pencil. (c) Remove the half shell (A-fig. 1). (2) Check for fuel leak (a) Make sure that there is no fuel in the box. (b) Make sure that there is no leak at the wig-o-flex coupling. (c) In case of fuel leak, repair it (Refer to TASK 20-32-00-360-802 ). (3) Removal of sealant (a) On the removed half shell (A-fig. 1), remove sealant, using a Plexiglas spatula. (b) On the other half shell (B-fig. 1), remove sealant from areas (C-fig. 1), using a Plexiglas spatula. (c) Perform a dipping on each half shell (A-B-fig. 1), using scotch brite then clean the areas with cleaner

. 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 6 / 11DASSAULT AVIATION Proprietary Data(4) Check the drain hole (a) Make sure that the drain hole of each drain box (D-fig. 1) is not obstructed. (b) Make sure that the LH and RH pylon drain holes are not obstructed. (5) Preparation of the fuel box CAUTION: DO NOT OBSTRUCT THE DRAIN HOLE (D-FIG. 1) WHEN YOU APPLY SEALANT. (a) Apply a thin coat of bead sealant in the bottom of each half shell as per fig. 2

. (b) Make sure that the drain hole (D-fig. 1) is not obstructed. (c) Let the bead sealant cure. (d) Apply bead sealant on the joggling areas fig. 1

. (e) Let the bead sealant cure. (f) Apply demolding agenton the areas (C-fig. 1) of the half shell (B-fig. 1). (g) Let the demolding agentdry for 5 minutes minimum. (h) Apply a second coat of demolding agenton the areas (C-fig. 1) of the half shell (B-fig. 1). (i) Let the demolding agentdry for 5 minutes minimum. (j) Apply bead sealant on the areas of the half shell (A-fig. 2). 

##  ̈ (6) Half shell installation

(a) Position the half shell (A-fig. 2) on the other half shell (B-fig. 2). (b) Apply bead sealantunder each screw head. (c) Install all the removed attaching parts following the recorded locations and fig. 1

. NOTE: On the LH and RH sides, install the screws (y-fig. 1) before screws (x-fig. 1). (d) Torque each screw to 0.374 m.daN (33.10 lbf.in). (e) Wipe the excess bead sealant around each fuel box. C. FINAL STEPS (1) Install the removed thermo-acoustic insulations. (2) Aircraft with humidifier system: (a) Install the pipe receiver (Refer to IPC fig. 21-72-40-05 ). (b) Install the humidifier receiver (Refer to IPC fig. 21-72-10-25 , item 150). (c) Connect the draining pipe ( Refer to IPC fig. 21-72-40-05 , item 330 ) to the pipe receiver (Refer to IPC fig. 21-72-40-05 , item 310). (3) Install the FR. 33 - FR. 36 lower lining ( 271CZ ) and the FR. 33 - FR. 36 lining ( 272CZ ) ( Refer to TASK 25-52-01-900-801 ). (4) Close the baggage compartment door ( BAG ) (Refer to TASK 52-30-00-860-801 ). (5) Install the pylon front lower access panel No.1 ( 431AB ) and the pylon front lower access panel No.1 ( 441AB ) (Refer to IPC fig. 54-50-30-10 , items 10A et 20A). 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 7 / 11DASSAULT AVIATION Proprietary DataD. RECORDING Record compliance with this Service Bulletin in the appropriate aircraft documents. Fill out the electronic Service Bulletin reply form located in the ”Service Bulletin" page on the Falcon portal. 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 8 / 11DASSAULT AVIATION Proprietary Data4. MATERIAL INFORMATION

A. LOCAL PROCUREMENT As indicated in Consumable Products Manual (CPM):

• bead sealant(AC 350 B2)

• cleaner

(Diestone)

• demolding agent(QZ 5111)

• scotch brite Miscellaneous • Cloths • Plexiglas spatula • Soft-lead pencil 

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April 08, 2014 ATA 53 Revision 1 Page 9 / 11DASSAULT AVIATION Proprietary DataFigure 1: LOCATION OF FUEL BOXES 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 10 / 11Figure 2: SEALANT PROTECTION



### END OF DOCUMENT 

# FALCON 7X 7X -284

April 08, 2014 ATA 53 Revision 1 Page 11 / 11