The investigation into a fiery downtown Anchorage plane crash that killed a 4-year-old boy is officially closed.
Thursday morning the National Transportation Safety Board released its probable cause report on the crash. It's the final step in the 10-month long investigation that began last June first after a Cessna 206 crashed shortly after taking off from Merrill Field.
Investigators concluded that pilot Preston Cavner overloaded the airplane with construction materials by more than 650 pounds.
The aircraft's center of balance was also off, causing Cavner to lose control. The plane slammed into a small building at 7th Avenue and Ingra Street and caught fire.
Cavner's 4-year-old son was killed in the crash. According to the NTSB, neither the boy or his 2-year-old brother were wearing seat belts at the time, which is a violation of federal regulations.