# Dassault Mandatory Service Bulletin 7X-092: Revision 1

- Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2011-0152; AD 2011-14-04 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Dassault Mandatory Service Bulletin 7X-092](https://openairdocs.org/service-documents/dassault/7x-092.md)
- Title as filed: U.S. DOT/FAA - Service Bulletin (SB 7x-092 R1)
- Pages: 10
- PDF: https://openairdocs.org/files/sha256/10/89/1089df541c92c5798c655af2e612250314762e871d94e02afc2f3cf55bd6c9d1
- Page: https://openairdocs.org/service-documents/dassault/7x-092/file/1089df541c92

## 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 7X
No 092-R1
JANUARY 04, 2010
MANDATORY
ATA 29
HYDRAULIC POWER
PRIMARY HYDRAULIC POWER
ADDITION OF A PROTECTIVE PLATE ON THE CENTER
REAR TANK WALL
FALCON SERVICE BULLETIN
Copyright © 2009 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

### Page 2

HYDRAULIC POWER
PRIMARY HYDRAULIC POWER
ADDITION OF A PROTECTIVE PLATE ON THE CENTER REAR TANK WALL
Revision 1 January 04, 2010
List of effective pages:
1 to 8
REASON: This Service Bulletin becomes mandatory in accordance with an EASA Airworthiness
Directive to be released.
FALCON 7X 7X-092
ATA 29

### Page 3

PRIMARY HYDRAULIC POWER
ADDITION OF A PROTECTIVE PLATE ON THE CENTER REAR TANK WALL
 
1. PLANNING INFORMATION
A. EFFECTIVITY
This Service Bulletin is applicable to FALCON 7X aircraft which have not previously implemented
DASSAULT AVIATION modification 7X M964.
B. REASON
In the L/H main Landing Gear (L/G) well, the theoretical clearance between the hydraulic pipe coupling of
the hydraulic system A return line and the center rear tank wall may not be sufficient. In case of contact,
this could lead to damage to the rear tank wall.
The purpose of this Service Bulletin is to protect the center rear tank wall from the hydraulic coupling, by
installing a protective plate on the center rear tank wall.
C. DESCRIPTION
The operation consists in:
• checking the rear tank wall contact area for good condition (visual inspection) and, if necessary, for
cracks (Penetrant crack detection or Eddy-current inspection),
• bonding a stainless steel protective plate on the rear tank wall, behind the hydraulic pipe T-junction.
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
This Service Bulletin covers DASSAULT AVIATION modification FALCON 7X M964 which 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:
• Visual inspection and installation of protective plate: 1 hour.
• Removal/installation of hydraulic pipe and non-destructive test: 4 hours.
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-092
January 04, 2010 ATA 29
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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 N101
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
Maintenance Manual:
• GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801)
• REMOVAL / INSTALLATION OF THE HYDRAULIC PIPES (Refer to TASK 20-33-00-900-801)
• PENETRANT CRACK DETECTION (Refer to TASK 20-70-00-230-801)
• EDDY-CURRENT DETECTION OF CRACKS (Refer to TASK 20-70-00-250-801)
• BLEEDING OF THE HYDRAULIC SYSTEMS (Refer to TASK 29-00-00-870-801)
• MANUAL OPENING / CLOSING OF THE MLG MAIN DOORS (Refer to TASK 32-10-00-860-801)
FALCON 7X 7X-092
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DASSAULT AVIATION Proprietary Data

### Page 5

K. OTHER PUBLICATIONS AFFECTED
None.
FALCON 7X 7X-092
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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) Manually open MLG main door (733) to access the L/H main L/G well (Refer to TASK
32-10-00-860-801).
B. PROCEDURE
(1) Unscrew and remove cover (A-fig. 1).
(2) Check the rear tank wall for good condition:
(a) Perform a visual inspection of the rear tank wall, to check for absence of marks at the contact
area (behind nut (B-fig. 1)):
• If no marks are detected, go to step (3).
• If contact marks are detected:
• Remove the hydraulic pipe (C-fig. 1) (Refer to TASK 20-33-00-900-801).
• At the contact area (fig. 1, detail B), perform either an Eddy current detection of cracks
(Refer to TASK 20-70-00-250-801 ) or a penetrant crack detection (Refer to TASK
20-70-00-230-801).
• If crack is detected, send a report to:
• structure-repair@dassault-aviation.com (E/H),
or
• structures@falconjet.com (W/H),
to get appropriate disposition before aircraft release.
• If no cracks are detected, go to step (3).
(3) Install the protective plate on the rear tank wall ( fig. 2):
(a) Clean the mounting area of:
• the rear tank wall to be protected,
• the protective plate to be bonded (1-fig. 2),
with a lint-free cloth moistened with cleaner.
(b) Bond the protective plate (1-fig. 2) to the rear tank wall, with interlaying sealant (fig. 2).
(c) Remove the excess sealant, expelled from the protective plate edges and drilled holes, with a
Plexiglas spatula.
(d) Wait for curing.
(e)  Apply lubricant spray on the protective plate, for a corrosion protection.
(4) If hydraulic pipe (C-fig. 1) is removed:
(a) Install hydraulic pipe (C-fig. 1) (Refer to TASK 20-33-00-900-801).
(b) Bleed the reservoir of hydraulic system A (Refer to TASK 29-00-00-870-801).
(5) Install cover (A-fig. 1).
FALCON 7X 7X-092
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DASSAULT AVIATION Proprietary Data

### Page 7

C. FINAL STEPS
(1) Manually close MLG main door ( 733) (Refer to TASK 32-10-00-860-801).
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-092
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DASSAULT AVIATION Proprietary Data

### Page 8

3. MATERIAL INFORMATION
A. MODIFICATION KIT
KIT P/N SBF7X0092A
NEW P/N
Q
T
Y
KEY WORD INSTRUCTIONSDISPOSITION
I
T
E
M
F
I
G
F7XC534545617 1 Protective plate 1 2
B. LOCAL PROCUREMENT
As indicated in Consumable Products Manual (CPM):
• cleaner.
• interlaying sealant (PS892C).
• lubricant spray.
FALCON 7X 7X-092
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DASSAULT AVIATION Proprietary Data

### Page 9 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 7X  7X-092
_FWD
(3002CF)  DASSAULT AVIATION Proprietary Data
ВДи
B
(1401GP)
Area to be inspected
Figure 1: Preparation Before Installation
January 04, 2010  ATA 29
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### Page 10 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 7X  7X-092
(3002CF)
DASSAULT AVIATION Proprietary Data  (1401GP)
0.6 in. (15 mm)
Figure 2: Installation of Protective Plate
January 04, 2010  ATA 29
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END OF DOCUMENT

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