Airworthiness Directives; Dassault Aviation Airplanes

We propose to adopt a new airworthiness directive (AD) for certain Dassault Aviation Model MYSTERE-FALCON 50, MYSTERE-FALCON 900, FALCON 900EX, FALCON 2000, and FALCON 2000EX airplanes. This proposed AD was prompted by a report of an in-flight lightning strike to the WHELEN anti-collision light located on the top of the vertical fin tip that caused severe damage and induced the loss of some airplane functions. This proposed AD would require modification of the anti- collision light bonding. We are proposing this AD to prevent loss of electrical power and essential functions, and possible reduced control of the airplane.