# FALCON 7X

No 163 DECEMBER 01, 2010 

# MANDATORY
ATA 24 ELECTRICAL POWER

RAM AIR TURBINE (RAT) REPLACEMENT OF THE RAT TRANSFORMER RECTIFIER UNIT P/N 5913703 

# FALCON SERVICE BULLETIN

Copyright © 2010 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

### ELECTRICAL POWER RAM AIR TURBINE (RAT) REPLACEMENT OF THE RAT TRANSFORMER RECTIFIER UNIT P/N 5913703

Initial issuance December 01, 2010 List of effective pages : 1 to 4 

# FALCON 7X 7X-163

ATA 24

### ELECTRICAL POWER RAM AIR TURBINE (RAT) REPLACEMENT OF THE RAT TRANSFORMER RECTIFIER UNIT P/N 5913703

1. PLANNING INFORMATION A. EFFECTIVITY This Service Bulletin is applicable to FALCON 7X aircraft with serial numbers 2 and subsequent which have not previously implemented DASSAULT AVIATION modification FALCON 7X M1125. B. REASON The manufacturer of the Transformer Rectifier Unit (TRU) P/N 5913703 has identified that some internal alternating current wires may have a low compression crimp, potentially impacting the electric conduction. This possible loss of conduction could result in a loss of electrical power, when the Ram Air Turbine (RAT) is extended to provide electrical power to the aircraft. The purpose of this Service Bulletin is to prevent the loss of electrical power when the RAT is extended by replacing the TRU with new one P/N 5915825. C. DESCRIPTION The operation consists in replacing the RAT TRU ( 2000PN ). 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 M1125 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: • Access: 4 hours. • Modification and tests: 9 hours (3 operators are necessary for the tests). 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-163

December 01, 2010 ATA 24 Initial issuance Page 1 / 4DASSAULT 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 ) • FUNCTIONAL TEST OF THE RAT SYSTEM (Refer to TASK 24-50-00-720-801 )

• REMOVAL / INSTALLATION OF THE RAT TRANSFORMER RECTIFIER UNIT (TRU) ( Refer to TASK 24-50-01-900-801 ) K. OTHER PUBLICATIONS AFFECTED The following publications will be revised at a later date to account for the changes introduced by this Service Bulletin: • Illustrated Parts Catalog. 

# FALCON 7X 7X-163

December 01, 2010 ATA 24 Initial issuance Page 2 / 4DASSAULT 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 (1) Replace the RAT TRU ( 2000PN ) (Refer to TASK 24-50-01-900-801 ) NOTE: The TRU removed must be returned to one of the addresses listed in paragraph 1.G. of this Service Bulletin. C. FINAL STEPS (1) Perform the functional test of the RAT system (Refer to TASK 24-50-00-720-801 ). 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-163

December 01, 2010 ATA 24 Initial issuance Page 3 / 4DASSAULT AVIATION Proprietary Data3. MATERIAL INFORMATION

A. MODIFICATION OF TRU PART NUMBER

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

5915825 1 TRU 5913703 NOTE: The TRU removed must be returned to one of the addresses listed in paragraph 1.G. of this Service Bulletin.



### END OF DOCUMENT 

# FALCON 7X 7X-163

December 01, 2010 ATA 24 Initial issuance Page 4 / 4DASSAULT AVIATION Proprietary Data