Federal investigators say flight recorders show that pilots of a UPS plane that crashed in Birmingham received warnings about their rate of descent moments before impact.
National Transportation Safety Board member Robert Sumwalt told reporters Friday a data recorder captured the first of two audible warnings in the cockpit before impact. Sumwalt says the warnings indicated the A300 cargo plane was descending at a rate outside normal parameters given its altitude.
But Sumwalt says investigators haven't made any determination on the actual cause of the crash.
Investigators say they have recovered the flight recorders on an ill-fated UPS cargo jet that crashed at Birmingham's airport this week, killing its two crew members.
Today's search focused on the tail section of the aircraft, where the cockpit voice recorder and the flight data recorder are typically located. The National Transportation Board says they should know tomorrow if data is on the recovered flight data recorders.
The two devices could hold key evidence about what happened as the jet was attempting to land in Birmingham early Wednesday.