Preliminary flight data from the deadly mid-air collision between an American Airlines jet and a U.S. military Black Hawk helicopter in Washington, DC has shown a significant discrepancy in altitude readings between the aircraft upon collision.
Data from the flight recorder inside American Eagle flight 5342 suggested it was cruising at about 325ft, with a 25ft margin of error on either side, when the aircraft collided over the Potomac River, adjacent to Reagan National Airport at 8:53 p.m. last Wednesday, according to the National Transportation Safety Board.
