A small plane that crashed in Alaska last month, killing all 10 people on board, was a half-ton overweight for the icy weather conditions under which it was flying, federal investigators said in their initial report Wednesday.

The plane, which disappeared Feb. 6 and was found the next day near the western coast of Alaska, was on a regularly scheduled afternoon flight between Unalakleet and Nome, a trip of about 150 miles.

Bering Air Flight 445 vanished about 10 minutes before it was set to arrive in Nome, according to the U.S. Coast Guard. When its position was lost, the aircraft was 12 miles offshore, it said.

After studying the baggage and cargo that was found, investigators with the National Transportation Safety Board determined that the weight of the plane at takeoff was about 1,000 pounds over the maximum takeoff weight for a flight heading into forecast or known icing conditions, according to guidelines. It was also about 800 pounds over the maximum takeoff weight for any flight operation, the investigators said in the nine-page report.

— The New York Times