(U.S. Coast Guard via AP, File)JUNEAU, Alaska -- The operator of a commuter plane that crashed on sea ice off Alaska last year, killing all 10 people on board, had a history of overweight flights, according to federal investigators. The National Transportation Safety Board, in a report released Thursday, also found the Federal Aviation Administration's oversight of the company, Bering Air, was inadequate. The NTSB said it found a pattern of underreported weights on Bering Air flight manifests and flights operating above weight limits. The report said the FAA's oversight “failed to identify and address the routine operation of overweight flights.” The plane was flying as part of a regularly scheduled commuter flight from the community of Unalakleet to Nome, a 150-mile (240-kilometer) trip.