On 4 January 2002, a Bombardier Challenger 604 became very quickly uncontrollable as the crew attempted to rotate for lift off at Birmingham and within a few seconds it had crashed inverted near the airport passenger terminal killing all on board. A rigorous Investigation found that an uncontrollable roll had occurred after an aerodynamic stall attributable to frost on the wings which had been noticed but apparently not considered indicative of a need for de-icing. The exclusively FAA promoted notion of  polished frost may have played a part in the pilots decision making and was considered to be dangerously misleading.