The new detail retreived from the black box suggests the Army helicopter was flying above 200 feet (61 meters), the maximum altitude for the route it was using.
Transportation safety investigators are seeking to determine if the pilots of the American Airlines plane detected danger just before the midair crash with a helicopter.
The crash of the Jet Rescue Air Ambulance, which operated the Learjet 55, comes two days after the country’s deadliest aviation disaster in almost a quarter century, in Washington, D.C.