October 8, 2007 - 6:44am

Tail-rotor failure appears to be the culprit in the May 4 crash of a Eurocopter AS 350 news helicopter in New York City. But the NTSB said that tail-rotor control continuity could not be determined because of the extensive damage caused when the helicopter slammed onto a rooftop in Brooklyn, N.Y. The WNBC-TV helicopter, N4NY, crashed into a four-story building before breaking in two and falling onto a two-story building.