BUFFALO, N.Y. (WPIX) -- The first lawsuit stemming from the crash of a commuter plane into a home outside Buffalo, New York was filed Friday by the relatives of one of the passengers.

All 49 people on the plane and one occupant of the home were killed when the Continental Airlines commuter plane crashed in icy weather on February 12th.

The family of crash victim Susan Wehle of Amherst, N.Y., alleges negligence in the crash and is asking for unspecified damages. The suit claims the aircraft had inadequate deicing equipment and an improperly trained crew.

The suit names Continental; Pinnacle Airlines of Memphis, Tennessee; the company that trained and supplied the crew, Colgan Air of Manassas, Virginia; and the company that made the plane, Bombardier Aerospace of Montreal.

Investigators have not determined the cause of the crash, but ice has been mentioned as a possibility.