Investigators have determined that critical equipment failures precipitated Sunday's fatal Amazon Prime Air cargo jet crash at Miami International Airport. The National Transportation Safety Board found that the aircraft's speed brakes and thrust reversers—essential systems for decelerating and stabilising the aircraft during descent—failed to activate, whilst wheel brakes were engaged. The incident resulted in five fatalities.

The crash has drawn scrutiny toward 21 Air, the North Carolina-based company that operated the Boeing 767 freighter for Amazon. The operator, controlled through an LLC by Houston Astros owner Jim Crane, now faces allegations from former employees and ex-pilots asserting the company systematically disregarded aviation safety regulations and dismissed safety concerns raised by flight crews.