As recovery crews endure cold water and miserable rain Friday to attempt to pull more wreckage of American Airlines Flight 5342 and an Army Black Hawk helicopter from the Potomac River, investigators are intensifying their search for the collision’s cause – with initial concerns already raised about the path of at least one of the aircraft.

The National Transportation Safety Board says it has recovered a cockpit voice recorder and flight data recorder from the American Airlines plane that collided with an Army Black Hawk helicopter near Reagan National Airport late Wednesday.

American Airlines will stop using flight number 5342, the number used by the jet that collided with a helicopter Wednesday night, for any future flights. The airline said the flight from Wichita, Kan.

An American Airlines plane carrying 60 passengers and four crew members collided with an Army Black Hawk helicopter outside Reagan National Airport near Washington, D.C. Wednesday night. A D.C. fire official said Thursday that “we don't think there are any survivors from this accident" and "we are switching from a rescue operation to a recovery operation.

The pilots of the American Airlines plane that collided with a U.S. Army helicopter late Wednesday night have been identified. Jonathan Campos, 34, was the captain of American Airlines Flight 5342 when an Army helicopter apparently flew into its path as it prepared for landing at Ronald Reagan National Airport near Washington,