# Dassault Mandatory Service Bulletin 7X-212: Revision 2

- Rights: © Dassault Aviation. Filed by the FAA in regulations.gov docket FAA-2011-0631; AD 2011-16-01 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Dassault Mandatory Service Bulletin 7X-212](https://openairdocs.org/service-documents/dassault/7x-212.md)
- Title as filed: U.S. DOT/FAA - SB 7x-212 R2
- Pages: 7
- PDF: https://openairdocs.org/files/sha256/e3/b6/e3b6b35c2a1a4a02fa537229d32aff322574a04968c72aa0a6988b8382fb0cde
- Page: https://openairdocs.org/service-documents/dassault/7x-212/file/e3b6b35c2a1a

## 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 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.
785

### Page 2

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

### Page 3

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 / 5
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
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 / 5
DASSAULT AVIATION Proprietary Data

### Page 5

2. 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 TI-
F7X-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 / 5
DASSAULT AVIATION Proprietary Data

### Page 6

3. 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 / 5
DASSAULT AVIATION Proprietary Data

### Page 7 (OCR)

DASSAULT  SERVICE BULLETIN
AVIATION
FALCON 7X  7X-212
ELECTROPRECISION  KAISER
IRVINE, CALIFORNIA - USA
CAGE CODE 86831
HORIZONTAL STABILIZER
ELECTRONIC CONTROL UNIT
PART NO.  4214 - 0031 - 6
REV. P  SER NO.  1168
RC-EMS  WEIGHT  3. 57 KG  DASSAULT AVIATION Proprietary Data
INSP  MFG DATE  08-10
30
DASSAULT F5142
EQUIPEMENTS
HOR. STAB. ELC. CTRL. UNIT  STAMP
REF (P/N)  051244-0 4
N° (S/N)  1168  DED  55  DATE
DATE  08-10  Cle (INSP.)
>
AMEND
MANUFACTURED BY KAISER ELEC.
Figure 1: HSECU Identification
July 07, 2011  ATA 27
Revision 2  Page 5 / 5
END OF DOCUMENT

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.