What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(.4) The pilot initiated an intersection takeoff on runway 35 with 600 feet of runway remaining to demonstrate the improved performance of the airplane with its newly installed engine and propeller STC package. He had routinely performed this feat. However, on this flight, the airplane was considerably heavier, since there was a passenger aboard and the aircraft had just been serviced with 75 gallons of fuel. Also, the density altitude was 3,200 feet, and the winds were reported as 'light from the south.' The pilot stated that once airborne, the airplane continued to accelerate, but failed to clear trees past the departure end of the runway. The engine operation was reported as normal, and no anomalies were reported.
As the FAA filed it
(.4) THE PILOT INITIATED AN INTERSECTION TAKEOFF ON RUNWAY 35 WITH 600 FEET OF RUNWAY REMAINING TO DEMONSTRATE THE IMPROVED PERFORMANCE OF THE AIRPLANE WITH ITS NEWLY INSTALLED ENGINE AND PROPELLER STC PACKAGE. HE HAD ROUTINELY PERFORMED THIS FEAT. HOWEVER, ON THIS FLIGHT, THE AIRPLANE WAS CONSIDERABLY HEAVIER, SINCE THERE WAS A PASSENGER ABOARD AND THE AIRCRAFT HAD JUST BEEN SERVICED WITH 75 GALLONS OF FUEL. ALSO, THE DENSITY ALTITUDE WAS 3,200 FEET, AND THE WINDS WERE REPORTED AS 'LIGHT FROM THE SOUTH.' THE PILOT STATED THAT ONCE AIRBORNE, THE AIRPLANE CONTINUED TO ACCELERATE, BUT FAILED TO CLEAR TREES PAST THE DEPARTURE END OF THE RUNWAY. THE ENGINE OPERATION WAS REPORTED AS NORMAL, AND NO ANOMALIES WERE REPORTED.