What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Pilot departed FL59 about 0800, and arrived at sef about 0830. He executed a GPS approach to runway 01, and landed uneventfully. He rolled on the runway to the end, then turned left onto taxiway and stopped. He performed the taxi checks, cleaned up the airplane, and noticed a Boeing 737 that was facing south on a taxiway that paralleled the runway. That airplane was south of the taxiway, and he thought it was parked. Neither he or his passengers recall seeing any people on the ground around the B737. He noticed that the left engine cowling of the B737 was missing, but he could not perceive either engine was running. He taxied west bound on the taxiway (later identified as A4), and when he was behind the 737 (about 200-300 ft), with no aileron control input applied, the left wing was raised and the right wing contacted the taxiway suddenly. The airplane cartwheeled and came to rest upright. The doors were opened and all occupants exited the airplane. After the event he looked towards the B737 and noticed 3-4 people standing there. He indicated the airplane vibrated and went off the taxiway.
As the FAA filed it
PILOT DEPARTED FL59 ABOUT 0800, AND ARRIVED AT SEF ABOUT 0830. HE EXECUTED A GPS APPROACH TO RUNWAY 01, AND LANDED UNEVENTFULLY. HE ROLLED ON THE RUNWAY TO THE END, THEN TURNED LEFT ONTO TAXIWAY AND STOPPED. HE PERFORMED THE TAXI CHECKS, CLEANED UP THE AIRPLANE, AND NOTICED A BOEING 737 THAT WAS FACING SOUTH ON A TAXIWAY THAT PARALLELED THE RUNWAY. THAT AIRPLANE WAS SOUTH OF THE TAXIWAY, AND HE THOUGHT IT WAS PARKED. NEITHER HE OR HIS PASSENGERS RECALL SEEING ANY PEOPLE ON THE GROUND AROUND THE B737. HE NOTICED THAT THE LEFT ENGINE COWLING OF THE B737 WAS MISSING, BUT HE COULD NOT PERCEIVE EITHER ENGINE WAS RUNNING. HE TAXIED WEST BOUND ON THE TAXIWAY (LATER IDENTIFIED AS A4), AND WHEN HE WAS BEHIND THE 737 (ABOUT 200-300 FT), WITH NO AILERON CONTROL INPUT APPLIED, THE LEFT WING WAS RAISED AND THE RIGHT WING CONTACTED THE TAXIWAY SUDDENLY. THE AIRPLANE CARTWHEELED AND CAME TO REST UPRIGHT. THE DOORS WERE OPENED AND ALL OCCUPANTS EXITED THE AIRPLANE. AFTER THE EVENT HE LOOKED TOWARDS THE B737 AND NOTICED 3-4 PEOPLE STANDING THERE. HE INDICATED THE AIRPLANE VIBRATED AND WENT OFF THE TAXIWAY.