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
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 / 5

DASSAULT AVIATION Proprietary Data
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
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 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 / 5

DASSAULT AVIATION Proprietary Data
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
Figure 1: HSECU Identification

END OF DOCUMENT

FALCON 7X 7X-212

July 07, 2011 ATA 27

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DASSAULT AVIATION Proprietary Data