The single most common factor in recent MU2 accidents has been the absence of formal MU2 training, either that simulator training
sponsored by Mitsubishi at SimCom or in-aircraft training provided by Howell Enterprises or Professional Flight Training, in the accident pilot’s operation. This may be in conjunction with such pilot’s operation lacking insurance or the decision by an underwriter insuring a fleet of cargo-only MU2s not to require such training. Joint efforts towards the issuance of the MU-2 Training SFAR in 2008 are meant to address this issue.
It is also noteworthy that cargo-only operations (including, of course, those with MU2s) are held to a lesser standard of safety-
oriented equipment, including not requiring autopilots or ground-proximity warning equipment, by the FAA than are aircraft carrying passengers or a certain number of passengers.