American Airlines jet collision: Helicopter crew in collision with plane may not have heard key instructions from tower
NTSB Chairwoman Jennifer Homendy discusses incomplete radio transmissions and altimeter issues in Black Hawk helicopter crash ...
Iowa Public Radio56m
Altimeter in Black Hawk helicopter may have malfunctioned before DCA mid-air collision
The National Transportation Safety Board says altimeter in the Black Hawk helicopter may have malfunctioned before the DCA mid-air collision with an American Airlines jet. All 67 people aboard died.