The NTSB said a preliminary report, to be released within a month, will contain "factual information" gathered in the investigation.

The black box was discovered eight feet underground at the crash site after a two-day search and is in “decent shape,” according to reports.

NTSB officials say they found the cockpit recorder from the plane that crashed in Philadelphia deep inside a crater left after the collision. CBS News Philadelphia's Ross DiMattei reports.