A preliminary analysis of the flight data and voice recorder on board a Black Hawk helicopter leading up to the collision with a commercial flight over Washington, DC, on January 29, indicated the helicopter’s altimeter may have been inaccurate and the pilots may not have heard some calls from the Reagan National Airport control tower,
Accident investigators are seeking to determine the accuracy of cockpit altimeter readings presented to pilots of the Sikorsky UH-60 Black Hawk that collided with a MHIRJ CRJ700 regional jet near Ronald Reagan Washington National airport on 29 January.
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