Regulation & law · 27/12/2001

MD Helicopters, Inc. Proposes Airworthiness Directive for Modified 369D, 369E, 369F, and 369FF Helicopters

The Federal Aviation Administration (FAA) is considering a new airworthiness directive (AD) for MD Helicopters, Inc. Model 369D, 369E, 369F, and 369FF helicopters with a tailboom modified according to Aerometals supplemental type certificate (STC) SH5055NM or SH4801NM, to prevent loss of a tail rotor gearbox due to bolts of inadequate grip length and subsequent loss of control of the helicopter.