A preliminary report from the National Transportation Safety Board said the commuter plane that crashed in Alaska, killing 10, was overweight for the weather.

The Alaska commuter plane that disappeared last month before its wreck was discovered with all 10 onboard dead was more than 1,000 pounds overweight at the time of takeoff, according to details of a preliminary investigation released Wednesday.

It isn’t yet clear what specific role the weight might have played in the Bering Air Cessna Caravan’s crash, and whether other factors were involved.

A Southwest plane and business jet that nearly collided at Midway last month came within 200 feet of each other, a preliminary report from federal investigators shows.

The National Transportation Safety Board released its preliminary report on Tuesday on the close call at Chicago Midway International Airport in February, when a Flexjet plane crossed the same runway where a Southwest Airlines flight was coming in to land.

A Flexjet pilot taxiing for takeoff Feb. 25 was blinded by sunlight and became disoriented, confusing one runway for another as a Southwest plane was preparing to land, investigators say. The Southwest pilots performed a go-around with seconds to spare.