The National Transportation Safety Board (NTSB), an independent agency charged by Congress with investigating every civil aviation accident in the United States, may take a year to determine the ...

A cockpit voice recorder was not functioning in an air ambulance that crashed in Philadelphia a minute after takeoff Jan. 31, according to a preliminary report from the National Transportation ...

The cockpit voice recorder -- or "black box" -- recovered from the medical jet that crashed in Northeast Philadelphia, killing seven people and injuring several others, never recorded the flight ...