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.

The estimated gross takeoff weight was about 1,058 pounds over the limit for icy conditions, according to a preliminary NTSB report.