The Air Force says a chafed electrical wire caused an F-22 Raptor fighter jet to crash near Tyndall Air Force Base in November.
An investigation board released the findings Friday.
The pilot ejected safely after a fire ignited in the jet's accessory bay.
According to the board's findings, the fire damaged the hydraulic system and caused the pilot to be unable to control the jet.
The military estimated the total damage from the crash to be around $150 million.
The single-seat jet went down near a remote section of Panhandle highway. No one on the ground was injured, and the pilot had no serious injuries.