National Transportation Safety Board investigator Luke Schiada said the pilot had reported "a low-fuel emergency" on approach to the airport Tuesday evening, but Schiada said it will take 10 to 12 days to complete a preliminary investigation into the crash, The Hartford Courant reported.
The Cirrus SR20 is equipped with an emergency parachute that slowed its descent before it hit a tree about 4 miles from the airport, the newspaper said.
Investigators said damage to the plane was "substantial" but Danbury Mayor Mark Boughton said the pilot and two passengers "walked away from the crash."
He said the pilot -- whose name was not reported -- "was shaken up, but OK."
Celebrity Families of 2014 [PHOTOS]