NTSB preliminary report details Miami cargo jet overrun

Preliminary findings from the National Transportation Safety Board indicate the Amazon Prime Air cargo jet that overran a Miami International Airport runway in early September touched down roughly 3,750 feet past the displaced threshold at the approach end of Runway 30, leaving little distance to stop.

The aircraft was a Boeing 767-33A flying for Amazon contractor 21 Air. Runway 30 is 9,360 feet long counting the displaced threshold.

Boeing documentation cited in the report states that a 767-300 freighter needs between about 4,200 and 5,500 feet to land, depending on weight, with flaps at 30 degrees on a dry runway at an airport near sea level. The planned landing weight was 231,236 pounds, some 95,000 pounds under the type's maximum. Five people died.

The weight-on-wheels parameter on the landing gear did not register "ground" until about 2,730 feet of runway remained. It alternated between air and ground indications for roughly seven seconds after the left and right main gear touched down at a groundspeed of about 160 knots.

Review of cockpit voice recorder data showed one pilot called for flaps at 30 degrees with about 41 seconds left on the recording, but measurements of slat track and flap support rod components in the wreckage were consistent with a 25-degree setting. Automated cockpit callouts warned the jet was descending too fast on approach. The crew did not begin a go-around until fewer than 1,000 feet of runway remained, and speed brakes were not deployed.