
Timeline shows the final seconds before impact
The NTSB laid out a timeline of the final moments after reviewing the Air Canada jet's cockpit voice recorder, which authorities recovered by cutting a hole in the aircraft's roof.
Investigators said that 25 seconds before the crash, the fire truck asked to cross the same runway where the plane had already been cleared to land nearly two minutes earlier.
One controller cleared the truck to cross the runway five seconds later, when the plane was a little more than 100 feet (30 meters) from the ground, the NTSB found.
Then, just nine seconds before the two collided, the tower told the fire truck to stop - a second before the plane's landing gear touched down, the NTSB said.
NTSB chair Jennifer Homendy said that it appears that the airport's runway status lights were working, which might have warned the fire truck driver not to cross the runway even if the controller approved it.
The lights embedded in the pavement are designed to automatically turn red when a runway is occupied to signal to vehicle operators and pilots not enter that runway.
The controller could also see the vehicles and the plane out the tower window, said John Cox, CEO of Safety Operating Systems. But there simply may not have been enough time to prevent the crash once the fire truck pulled onto the runway.







