FALCON 7X

No 065

JULY 24, 2009

MANDATORY

ATA 32

LANDING GEAR

WEIGHT-ON-WHEELS (WOW)

FUSE ADDITION ON PROXIMITY SENSORS

FALCON SERVICE BULLETIN

Copyright © 2009 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

0900400080342772 - VALIDATED - Certification Repository 
LANDING GEAR

WEIGHT-ON-WHEELS (WOW)

FUSE ADDITION ON PROXIMITY SENSORS

Initial issuance July 24, 2009

List of effective pages:

1 to 11

FALCON 7X 7X-065

ATA 32
LANDING GEAR

WEIGHT-ON-WHEELS (WOW)

FUSE ADDITION ON PROXIMITY SENSORS

1. PLANNING INFORMATION

A. EFFECTIVITY

This Service Bulletin is applicable to FALCON 7X aircraft which have not implemented DASSAULT

AVIATION modification FALCON 7X M1031.

B. REASON

In case a short circuit occurs on a Weight-On-Wheels (WOW) proximity sensor wiring, the associated

power supply circuit breaker will trip. As one circuit breaker powers several WOW proximity sensors, those

will be de-powered at the same time.

The purpose of this Service Bulletin is to improve the WOW function robustness against any short circuit

on landing gear proximity sensor wiring. To achieve this, fuses are added on each electrical power supply

of the nine WOW sensors. This will prevent a multiple loss of WOW proximity sensors in case of a short

circuit on one sensor wiring.

C. DESCRIPTION

The operation consists in installing nine plug-in fuses in the wiring near the electrical cabinets (FR8-9,

cockpit):

• five fuses are installed on top of the LH electrical cabinet, close to junction module (203 J3),

• four fuses are installed on top of the RH electrical cabinet, close to junction module (202 J4).

D. COMPLIANCE

Mandatory:

(1) It is anticipated that this Service Bulletin will be rendered mandatory by an EASA Airworthiness

Directive.

(2) 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 M1031 which has been

approved by EASA.

The technical content of this document is approved under the authority of DOA nr. EASA.21J.051.

F. LABOR

Estimated labor-hours: 9 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.

FALCON 7X 7X-065

July 24, 2009 ATA 32

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DASSAULT AVIATION Proprietary Data
G. MATERIAL - PRICE AND AVAILABILITY

The modification kit may be obtained from either address listed below:

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: Negligible.

Change in balance with respect to 25% MAC: Negligible.

J. REFERENCES

Aircraft Maintenance Manual:

• GENERAL MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK 20-95-00-910-801)

• USE OF THE AIRCRAFT MAINTENANCE PROCEDURES (Refer to TASK 24-00-00-860-803)

• ELECTRICAL SYSTEM MAINTENANCE AND SAFETY PRECAUTIONS (Refer to TASK

24-00-00-910-801)

• USE OF THE TARGETS FOR FLIGHT SIMULATION (Refer to TASK 32-60-00-910-802)

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
• USE OF CENTRAL MAINTENANCE COMPUTER (CMC) QUICK REFERENCE HANDBOOK

(Refer to TASK 45-10-00-910-801)

Wiring Diagram Manual:

• Chap. 24-10-00

• Chap. 32-62-30

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.

• Aircraft Maintenance Manual.

• Wiring Diagram Manual.

FALCON 7X 7X-065

July 24, 2009 ATA 32

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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).

(2) Remove the cockpit lateral lining No.5 (221XZ) to gain access to LH front SPDB (L1000PM).

(3) On LH front SPDB (L1000PM), open the following circuit breakers:

• "LH WOW" circuit breaker (L210GW),

• "RH WOW LH" circuit breaker (L110GW).

(4) Remove the cockpit lateral lining No.5 (222XZ) to gain access to RH front SPDB (R1000PM).

(5) On RH front SPDB (R1000PM), open the following circuit breakers:

• "RH WOW" circuit breaker (R210GW),

• "LH WOW RH" circuit breaker (R110GW).

B. GENERAL ELECTRICAL INSTRUCTIONS

(1) Obey the electrical safety precautions (Refer to TASK 24-00-00-910-801).

(2) Check that all connections are properly protected to ensure proper insulation and that markings are

visible and appropriate.

(3) Visually inspect the work area for particles or debris, then vacuum-clean. The blowing of compressed

air is prohibited since it could move metal chips to inaccessible areas.

C. FUSE INSTALLATION

(1) On top of LH front SPDB (L1000PM), close to junction (203 J3) (fig. 1):

Install the five following fuses (Items 1,2,3,4 and 5) as follows:

• WOW1 LH MLG fuse (L2013GA)

• WOW2 LH MLG fuse (L3013GA)

• WOW3 LH MLG fuse (L4013GA)

• WOW1 NLG fuse (L2511GB)

• WOW2 NLG fuse (R2511GB)

(a) Do the electrical wiring modifications in accordance with wiring diagram in fig. 3.

CAUTION: PAY PARTICULAR ATTENTION TO THE WIRING INSTALLATION

REQUIREMENT SHOWN IN FIG. 1, DETAIL A.

(b) Install the five fuses along the straight section of main harness.

CAUTION: DO NOT USE SELF-TIGHTENING CLAMP OR WIRE TIES.

(c) Attach the five fuses on main harness with binding.

(d) Bond the appropriate fuse identification labels.

(e) Do a wire-by-wire check of the new wiring installation:

• Successively, check the continuity between terminal A (landing gear wiring) of :

• LH MLG WOW proximity switch 1 (L2003GA),

• LH MLG WOW proximity switch 2 (L3003GA),

FALCON 7X 7X-065

July 24, 2009 ATA 32

Initial issuance Page 4 / 11

DASSAULT AVIATION Proprietary Data
• LH MLG WOW proximity switch 3 (L7003GA),

• NLG WOW proximity switch 1 (L2501GB),

• NLG WOW proximity switch 2 (R2501GB),

and terminal S4 (feeder) of RH front SPDB (R1000PM) (WD 24-10-00).

(2) On top of RH front SPDB (R1000PM), close to junction (204 J2) (fig. 2):

Install the four following fuses (items 6,7,8 and 9) as follows:

• WOW1 RH MLG fuse (R2013GA)

• WOW2 RH MLG fuse (R3013GA)

• WOW3 RH MLG fuse (R4013GA)

• WOW3 NLG fuse (2011GB)

NOTE: In order to facilitate the fuse installation, the equipment in the work area can be moved aside

but not disconnected.

(a) Do the electrical wiring modifications in accordance with wiring diagram in fig. 3.

CAUTION: PAY PARTICULAR ATTENTION TO THE WIRING INSTALLATION

REQUIREMENT SHOWN IN FIG. 2, DETAIL A.

(b) Install the four fuses along the straight section of main harness.

CAUTION: DO NOT USE SELF-TIGHTENING CLAMP OR WIRE TIES.

(c) Attach the four new fuses on main harness with binding.

(d) Bond the appropriate fuse identification labels.

(e) Do a wire-by-wire check of the new wiring installation:

• Successively, check the continuity between terminal A (landing gear wiring) of :

• RH MLG WOW proximity switch 1 (R2003GA),

• RH MLG WOW proximity switch 2 (R3003GA),

• RH MLG WOW proximity switch 3 (R7003GA),

• NLG WOW proximity switch 3 (2001GB),

and terminal S2 (feeder) of LH front SPDB (L1000PM) (WD 24-10-00).

D. TEST

(1) Energize the aircraft from the electrical Ground Power Unit (GPU):

(a) Connect the electrical GPU (Refer to TASK 24-00-00-860-803).

(b) Energize the aircraft (Refer to TASK 24-00-00-860-803).

(2) Close the following circuit breakers:

• "LH WOW" circuit breaker (L210GW),

• "RH WOW LH" circuit breaker (L110GW),

• "RH WOW" circuit breaker (R210GW),

• "LH WOW RH" circuit breaker (R110GW).

(3) Use the flight simulation targets to simulate an “In Flight” configuration on each proximity switch (Refer

to TASK 32-60-00-910-802).

(4) Get access to the "GROUND/FLIGHT SENSORS STATUS" maintenance screen (Refer to TASK

45-10-00-910-801).

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
(5) Make sure that the parameters that follow are:

• "LH MLG WOW1 STATUS" IN FLIGHT,

• "LH MLG WOW2 STATUS" IN FLIGHT,

• "LH MLG WOW3 CHA STATUS" IN FLIGHT,

• "LH MLG WOW3 CHB STATUS" IN FLIGHT,

• "RH MLG WOW1 STATUS" IN FLIGHT,

• "RH MLG WOW2 STATUS" IN FLIGHT,

• "RH MLG WOW3 CHA STATUS" IN FLIGHT,

• "RH MLG WOW3 CHB STATUS" IN FLIGHT,

• "NLG WOW1 STATUS" IN FLIGHT,

• "NLG WOW2 STATUS"IN FLIGHT,

• "NLG WOW3 CHA STATUS" IN FLIGHT,

• "NLG WOW3 CHB STATUS" IN FLIGHT.

(6) Remove the flight simulation targets from each proximity switch (Refer to TASK 32-60-00-910-802).

(7) Make sure that the parameter corresponding to the simulated proximity switch shows “ON GROUND”

status.

(8) De-energize the aircraft (Refer to TASK 24-00-00-860-803).

(9) Disconnect the electrical GPU (Refer to TASK 24-00-00-860-803).

E. FINAL STEPS

(1) Install the cockpit lateral lining No.5 (221XZ).

(2) Install the cockpit lateral lining No.5 (222XZ).

F. 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.

Incorporate the diagram of figure 3 into the aircraft Wiring Diagram Manual, chap. 32-62-30.

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
3. MATERIAL INFORMATION

A. MODIFICATION KIT - ELECTRICAL CIRCUIT

KIT P/N SBF7X0065A

NEW P/N

Q

T

Y

KEY WORD INSTRUCTIONS

DISPOSITION

I

T

E

M

F

I

G

BJE 267 9 Fuse 1, 2, 3, 4,

5, 6, 7, 8,

9

1, 2

01EQT53105A20P01 18 Contact Fuse contacts

01EQT53105A22P01 9 Contact Module contacts

01CAN211-1-22 9 m Cable

L2013GA 1

Sheath

01PRORNF1-2GR Fuse markings

L3013GA 1

L4013GA 1

L2511GB 1

R2511GB 1

R2013GA 1

R3013GA 1

R4013GA 1

2011GB 1

L2013GA 1

E19 label with black

marking

Fuse identification on

aircraft structure

L3013GA 1

L4013GA 1

L2511GB 1

R2511GB 1

R2013GA 1

R3013GA 1

R4013GA 1

2011GB 1

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
NEW P/N

Q

T

Y

KEY WORD INSTRUCTIONS

DISPOSITION

I

T

E

M

F

I

G

L2013GA/203J3-N12 2

Sleeve

01PROTMS3-32GR Wire markings

3

L3013GA/203J3-N12 2 3

L4013GA/203J3-N12 2 3

L2511GB/203J3-N12 2 3

R2511GB/203J3-N12 2 3

R2013GA/202J4-A12 2 3

R3013GA/202J4-A12 2 3

R4013GA/202J4-A12 2 3

2011GB/202J4-A12 2 3

B. LOCAL PROCUREMENT

Binding (01FFFTF4BK, black)

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
Figure 1 : Fuse Installation - LH Cabinet

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DASSAULT AVIATION Proprietary Data
Figure 2 : Fuse Installation - RH Cabinet

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data
Figure 3 : Fuse Installation - Wiring Modification

END OF DOCUMENT

FALCON 7X 7X-065

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DASSAULT AVIATION Proprietary Data