E ASA AD No : 20 1 5

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- Internet/Intranet. 

## EASA AIRWORTHINESS DIRECTIVE

AD No

. : 20 1 5
- 0 006

Date : 15 January 2015

Note: This Airworthiness Directive (AD) is issued by EASA, acting in accordance with Regulation (EC) No 216/2008 on behalf of the European Community, its Member States and of the European third countries that participate in the activities of EASA under Article 66 of that Regulation

. This AD is issued in accordance with EU 748/2012, Part 21.A.3B. In accordance with EU 1321/2014 Annex I, Part M.A.301, the continuing airworthiness of an aircraft shall be ensured by accomplishing any applicable ADs. Consequently, no person may ope rate an aircraft to which an AD applies, except in accordance with the requ irements of that AD, unless otherwise specified by the Agency [EU 1321/2014 Annex I, Part M.A.303] or agreed with the Authority of the State of Registry [EC 216/2008, Article 14(4) exemption]

. 

### Design Approval Holder’s Name: D ASSAULT A VIATION Type/Model designation(s): Myst è re - Falcon 50, Myst è re - Falcon 900, Falcon 900EX, Falcon 2000 and F alcon 2000EX aeroplanes

TCDS Number s : EASA.A. 062 and EASA. A.0 08

F oreign AD : Not a pplicable
Supersedure : None



### ATA 39 Lightning

– Anti
- C ollision L ight B onding

– Modification

Manufacturer(s): Dassault Aviation (formerly Avions Marcel Dassault, Bréguet Aviation)
Applicability: Myst è re - Falcon 50 , Myst è re - Falcon 900 , Falcon 900EX , Falcon 2000 and Falcon 2000EX aeroplanes , all serial numbers, as defined in Appendix 1 of this AD

. Reason: An occurrence was reported where a Falcon 2000 aeroplane experienced a n in

flight lightning strike , which caus ed sever e damage and induced the loss of some aeroplane functions. The investigation results revealed that the entering point of the lightning was at the WHELEN anti

- collision light located on the top of the vertical fin tip. When the lightning strike hit the anti

- collision light , an electric arc occurred between the aeroplane structure and the anti

- collision light and creat e d a conductive path by which the l ightning current enter ed inside the a e r o plane

. Further analysis h as determined that the electrical bonding between the WHELEN anti

- collision light, Part Number (P/N) 01

- 0790044

- 09, and the fin tip fairing or the No. 2 engine air intake cover is insufficient to withstand a lightning strike. In case of severe lightning, this condition, i f not corrected, could lead to an unsafe condition ( loss of electrical powe r and/or of essential functions) possibly resulting in reduced control of the aeroplane

. To address this potential unsafe condition , Dassault Aviation developed a modification (mod) to improve the WHELEN anti

- collision light bonding when the anti

- collision light is located on top of the vertical fin tip or on No. 2 engine air intake cover, and issued several Serv ice Bulletins (SB) to modify all affected aeroplanes in service

. For the reasons described above, this AD requires modification of the anti

-E ASA AD No : 20 1 5

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TE.CAP.0011 0

- 00 4 © European Aviation Safety Agency. All rights reserved. 2 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. collision light bonding.

Effective Date: 29 January 2015
Required A ction(s) and Compliance Time(s): Required as indicated, unless accomplished previously : Within 24 months after the effective date of the AD , modify the anti

- collision light bonding in accordance with the instructions of the applicable Dassault Aviation S B , depending on aeroplane model and configuration, as specified in Table 1 of this AD. Table 1

– Applicable Dassault Aviation SB Aeroplane Affected Configuration(s) SB Mystère

- Falcon 50 see Appendix 1 F50

- 481
Mystère

- Falcon 900 see Appendix 1

– Group 1 F900

- 372

see Appendix 1

– Group 2 F900

- 378

Falcon 900EX see Appendix 1

– Group 1 F900EX

- 285

see Appendix 1

– Group 2 F900EX

- 305 Falcon 2000 see Appendix 1 F2000

- 337 Falcon 2000EX see Appendix 1 F2000EX

- 108

Ref. Publications: Dassaul t Aviation SB F 50

- 481 original issue , date d 22 August 2007

. Dassaul t Aviation SB F 900

- 372 original issue , date d 22 August 2007

. Dassaul t Aviation SB F 900

- 378 original issue , date d 19 September 2007

. Dassaul t Aviation SB F900EX

- 285 original issue , date d 18 July 2007

. Dassaul t Aviation SB F900EX

- 305 original issue , date d 19 September 2007

. Dassaul t Aviation SB F2000

- 337 original issue , date d 25 July 2007

. Dassaul t Aviation SB F2000EX

- 108 original issue , date d 25 July 2007

. The use of later approved revisions of these documents is acceptable for compliance with the requirements of this AD.

Remarks : 1. If requested and appropriately substantiated, EASA can approve Alternative Methods of Compliance for this AD.
2. This AD was posted on 18 September 2014 as PAD 14

- 166 for consultation until 16 December 2014. The Comment Response Document can be found at http://ad.easa.eur opa.eu/

. 3. Enquiries regarding this AD should be referred to the Safety Information Section, C e rtification Directorate, EASA. E

- mail: ADs@easa.europa.eu

. 4. For any question concerning the technical content of the requirements in this AD, please contact your Dassault Falcon Technical Assistance:

 For Europe, Middle East and Africa based operators: Hot Line: (33) 1 47 11 37 37

 For USA, Canada and Mexico based operators: Help De sk: (1) 800

- 2FALCON (2325266)

 All other areas : Help Desk: (1) 201 541 4747E ASA AD No : 20 1 5

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- 00 4 © European Aviation Safety Agency. All rights reserved. 3 / 3 Proprietary document. Copies are not controlled. Confirm revision status through the EASA

- Internet/Intranet. 

### Appendix 1

– Applicability Definition

Aeroplane s Configuration

– AD applicable on all serial

numbers on which Mod (see Notes 1 to 3) Except aeroplane s modified through ( see Note 4) Mod embodied in production SB in service
Myst è re - Falcon 50 M1853 has been embodied in production or in service through SB F50

- 241 M2083 or M3094 SB F50

- 257
Myst è re - Falcon 900 Group 1: M1682 has been embodied in production or in service through SB F900

- 182 M5381
Group 2: M1682 has been embodied in production or in service through SB F900

- 182 and Mod M1947 has been embodied in production or in service through SB F900

- 176 M5386

Falcon 900EX Group 1: M1682 has been embodied in production or in service through SB F900 EX

- 025 M5381
Group 2: M1682 has been embodied in production or in service through SB F900

- 025 and M od M1947 has been embodied in production or in service through SB F900 EX

- 19 M5103 or M5386

Falcon 2000 M331 has been embodied in production or in service through SB F2000

- 44 M810 or M1061 or M2778 SB F2000

- 111

Falcon 2000EX M1802 has been embodied in production M810 or M1061 or M2778

Note 1: All Mod and all SB specified in the Table above are from Dassault Aviation. Note 2 : Mod M2083, SB F50

- 257, Mod M1947, SB F900

- 176, SB F900 EX

- 19 , Mod M5103, as applicable, introduce fin tip SATCOM fairing, in production or in service. Note 3: Grou p 1 : Aeroplanes with Whelen anti

- collision light located on top of vertical fin tip, Grou p 2 : Aeroplanes with Whelen anti

- collision light located on top of air intake engine No. 2. Note 4 : The excluded aeroplanes as specified in t he Table above embody either one Mod in production or one SB in service, as applicable.