The FAA is proposing a new airworthiness directive for certain models of Dassault Falcon 2000, Falcon 2000EX, Falcon 900, Falcon 900EX and all models of the Falcon 50. It is prompted by reports that collapse of the main landing gear could cause wing-tank structural failure, resulting in fuel spillage and fire hazard. It would require modification of the wing fuel tanks in the area of the wheel well. The FAA is taking comments until November 26.