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 / 4

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)

• 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

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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

(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 / 4

DASSAULT AVIATION Proprietary Data
3. 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

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DASSAULT AVIATION Proprietary Data