Too much moose meat and antlers strapped to a wing caused a deadly small plane crash in Alaska, a nearly two-year long investigation by the National Transportation Safety Board determined in a report released Tuesday.

The plane crashed shortly after takeoff in a mountainous area of southwestern Alaska on Sept. 12, 2023. The pilot, Eugene Peltola Jr., 57, died in the crash.

A fatal plane crash in Alaska in 2023 may have been caused by excess moose meat and antlers on board, according to a newly-released report.