The incident involving a single-engine Diamond DA40 took place around 5:30 p.m. Monday, said the FAA, adding that the pilot "reported losing the left rear passenger door." ...

A tilt-up cockpit canopy is one of the distinguishing features of the DA40 NG, which is a "next generation" diesel-powered version of a plane made by Diamond Aircraft Industries.

The preliminary report depicted that a Southwest Airlines Boeing 737-700 and a Diamond DA40 were separated by 857 feet (261.2 meters) on the ground.

The Diamond DA40 is powered by an automotive-derived Austro AE 300 diesel engine that sips fuel compared with traditional aero engines.