takeoff

Hard objects pose a threat even at relatively low takeoff or landing speeds of above 100 miles an hour.

Investigators have said the accident was caused by one of the engines catching fire and detaching during takeoff.

First, it notes that seconds after takeoff, the fuel cutoff switches - normally used when starting the engines before a flight and shutting them down afterwards – had been moved from the "run" to the cutoff position.

Before every takeoff, pilots did two hours of “pre-breathing”—breathing in pure oxygen to eliminate nitrogen from the blood.

One of the jet’s engines detached from the left wing during takeoff and was found on the ground at the airport, National Transportation Safety Board officials said in a press briefing on Wednesday.