# FALCON 7X

No 212-R2 JULY 07, 2011 

# MANDATORY
ATA 27 FLIGHT CONTROLS

HORIZONTAL STABILIZER CHECK OF THE HORIZONTAL STABILIZER ELECTRONIC CONTROL UNIT (HSECU) P/N 051244-04 

# FALCON SERVICE BULLETIN

Copyright © 2011 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.



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### FLIGHT CONTROLS HORIZONTAL STABILIZER CHECK OF THE HORIZONTAL STABILIZER ELECTRONIC CONTROL UNIT (HSECU) P/N 051244-04

Initial issuance June 20, 2011 List of effective pages : 1 to 5
Revision 1 June 23, 2011 List of effective pages : 1 to 5 List of modified pages : 1, 3 and 4 REASON: To add that the letter “V” on the HSECU identification plate must be stamped by

Rockwell Collins Quality Department.
Revision 2 July 07, 2011 List of effective pages : 1 to 5 List of modified pages : 1, 3 and 4 REASON: To add HSECU P/N 051244-05 as a new part.

This revision is not applicable to aircraft which have already implemented a previous revision of this Service Bulletin. 

# FALCON 7X 7X-212

ATA 27

### FLIGHT CONTROLS HORIZONTAL STABILIZER CHECK OF THE HORIZONTAL STABILIZER ELECTRONIC CONTROL UNIT (HSECU) P/N 051244-04

1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to FALCON 7X aircraft with serial numbers 1 and subsequent which are equipped with Horizontal Stabilizer Electronic Control Unit (HSECU) part number 051244-04. B. REASON Following a pitch trim incident reported on a FALCON 7X aircraft, it has been determined that a potential manufacturing defect may affect the HSECU P/N 051244-04 and may be a contributing factor in the pitch trim incident. The purpose of this Service Bulletin is to replace the HSECU P/N 051244-04 without the letter “V” written on the identification plate. C. DESCRIPTION The operation consists in:

• checking if the letter “V” is stamped by Rockwell Collins Quality Department on the identification plate of the HSECU installed on the aircraft, • replacing the HSECU P/N 051244-04 without the letter “V” with a serviceable one. D. COMPLIANCE Mandatory: • This Service Bulletin is mandatory by the EASA Airworthiness Directive N°. 2011-0114. • As prescribed by the Airworthiness Authorities of the country of registration of the aircraft. E. APPROVAL This Service Bulletin covers DASSAULT AVIATION FALCON 7X modification M1239 which has been approved by the EASA. The technical content of this document is approved under the authority of DOA nr. EASA.21J.051. F. LABOR Estimated labor-hours: 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-212

July 07, 2011 ATA 27 Revision 2 Page 1 / 5DASSAULT 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 Aircraft Maintenance Manual: • GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-00-00-910-801 )

• REMOVAL / INSTALLATION OF THE HORIZONTAL STABILIZER ELECTRONIC CONTROL UNIT (HSECU) (Refer to TASK 27-40-09-900-801 ) K. OTHER PUBLICATIONS AFFECTED The following publication will be revised at a later date to account for the changes introduced by this Service Bulletin: • Illustrated Parts Catalog 

# FALCON 7X 7X-212

July 07, 2011 ATA 27 Revision 2 Page 2 / 5DASSAULT AVIATION Proprietary Data2. ACCOMPLISHMENT INSTRUCTIONS

A. PRELIMINARY STEPS (1) The aircraft must be in the maintenance configuration (Refer to TASK 20-00-00-910-801 ). B. PROCEDURE Refer to fig. 1 (1) Get access to the HSECU ( 301CH ) to check if the letter “V” is stamped by Rockwell Collins Quality Department on the identification plate (Refer to TASK 27-40-09-900-801 ):

• If the letter “V” is stamped by Rockwell Collins Quality Department on the identification plate, no further action is required, perform the close-up paragraph of procedure 27-40-09-900-801.

• If the letter “V” is not stamped by Rockwell Collins Quality Department on the identification plate, remove and replace the HSECU (Refer to TASK 27-40-09-900-801 ). NOTE: The removed HSECU ( 301CH ) must be sent to one of the addresses listed in paragraph 1.G. of this Service Bulletin for compliance with TI-F7X-051244-04 or TIF7X-051244-05

. C. FINAL STEPS (1) If the HSECU has been removed and replaced: (a) Perform the test of the HSECU ( 301CH ) (Refer to TASK 27-40-09-900-801 ). (b) Perform the “close-up” paragraph of procedure 27-40-09-900-801.
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-212

July 07, 2011 ATA 27 Revision 2 Page 3 / 5DASSAULT AVIATION Proprietary Data3. MATERIAL INFORMATION

A. MODIFICATION OF HSECU PART NUMBER

NEW P/N Q T Y KEY WORD OLD P/N

051244-02 or 051244-04 with the letter “V” stamped by Rockwell Collins Quality Department or 051244-05 1 HSECU 051244-04 without the letter “V”

NOTE 1: Compliance with this Service Bulletin by substituting the above part number(s) with (an)

interchangeable subsequent part number(s) is acceptable, provided the subsequent part numbers have the same effectivity as the original part number. NOTE 2: The removed HSECU must be sent to one of the addresses listed in paragraph 1.G. of this

Service Bulletin for compliance with TI-F7X-051244-04 or TI-F7X-051244-05

. 

# FALCON 7X 7X-212

July 07, 2011 ATA 27 Revision 2 Page 4 / 5DASSAULT AVIATION Proprietary DataFigure 1: HSECU Identification



### END OF DOCUMENT 

# FALCON 7X 7X-212

July 07, 2011 ATA 27 Revision 2 Page 5 / 5DASSAULT AVIATION Proprietary Data