Another airline expert, Philip Butterworth-Hayes, said the safety of the Boeing 737 along with the five runways of Schiphol Airport in Amsterdam and its advanced safety systems would have helped as the pilot tried to land the plane.
Owen and another audio expert, Ed Primeau, analyzed the recording for the Sentinel using different techniques, and they said they don't believe it is Zimmerman who is heard yelling in the background of one 911 call.