What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The aircraft was at low altitude when it hit some turbulence. This caused the pilot's hat to blow off and strike the propeller behind the pilot. One of the propeller blades broke off in flight as a result of striking the hat. The aircraft then began to lose altitude. In an attempt to make an emergency landing in a field the aircraft lost too much altitude and landed upright in bushes. This aircraft was not registered at the time of this incident. This aircraft does not meet the requirements of FAR part 103.
As the FAA filed it
(-23) THE AIRCRAFT WAS AT LOW ALTITUDE WHEN IT HIT SOME TURBULENCE. THIS CAUSED THE PILOT'S HAT TO BLOW OFF AND STRIKE THE PROPELLER BEHIND THE PILOT. ONE OF THE PROPELLER BLADES BROKE OFF IN FLIGHT AS A RESULT OF STRIKING THE HAT. THE AIRCRAFT THEN BEGAN TO LOSE ALTITUDE. IN AN ATTEMPT TO MAKE AN EMERGENCY LANDING IN A FIELD THE AIRCRAFT LOST TOO MUCH ALTITUDE AND LANDED UPRIGHT IN BUSHES. THIS AIRCRAFT WAS NOT REGISTERED AT THE TIME OF THIS INCIDENT. THIS AIRCRAFT DOES NOT MEET THE REQUIREMENTS OF FAR PART 103.