Newly released black box data has shed light on the final moments before an Amazon Air cargo plane overran a runway at Miami International Airport, killing five people on the ground.

According to a preliminary investigative update from the National Transportation Safety Board (NTSB), one of the pilots repeatedly warned that the Boeing 767 was traveling “too fast” as it approached the runway. The pilot continued to express concern about the aircraft’s excessive speed, while there was no consistent verbal response from the other pilot.

The cockpit voice recorder also captured several automated warnings from the aircraft’s Ground Proximity Warning System. The system twice issued a “sink rate” alert and five times warned “too low terrain” as the plane descended toward the airport.

After the aircraft touched down, one pilot called for a “go-around,” indicating an attempt to abort the landing and take off again. Flight data showed that the plane was traveling at nearly 140 mph when a pilot released the wheel brakes and advanced the throttles to full takeoff power. However, about four seconds later, the throttles were returned to idle and the brakes were reapplied. By then, the aircraft was unable to stop before leaving the runway.

The Boeing 767-300, operated by contractor 21 Air for Amazon Air, ultimately traveled beyond the runway and struck a van carrying cleaning workers, as well as other vehicles and airport barriers. Five people on the ground were killed, while the two pilots survived the crash.

Investigators also found no indication that the aircraft’s speed brakes or thrust reversers had been deployed during the incident. The NTSB has emphasized that its findings remain preliminary and may change as the investigation continues. Investigators planned to interview the pilots to better understand their actions and the sequence of events inside the cockpit.

The newly released recordings provide investigators with additional information about the pilots’ actions and communications, but officials have not yet determined the definitive cause of the crash.

Sources: CNN report via News Channel 3-12 · CBS News Miami report