What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Aircraft was not intended for flight. Airman stated that he attempted to start the aircraft with the intention of charging the battery and taxiing to the fuel tank for fuel. The aircraft was parked on the south transient ramp over the nights of 7/4/2015 and 7/5/2015. The airman stated that the battery was either weak or dead and the airplane would not start. He started the plane by hand propping the engine. As he attempted to board the airplane from the rear of the right wing, he said the airplane jumped the chock when he added his weight to the step and the nose elevated over the chock. The airplane started to move without anyone on board came to a stop in a drainage ditch. The ditch is located a short distance to the west of where the airplane was parked.
The airman sustained minor abrasions to his nose, left hand knuckles and forearm as a result of his slipping off of the trailing edge of the wing.
As the FAA filed it
AIRCRAFT WAS NOT INTENDED FOR FLIGHT. AIRMAN STATED THAT HE ATTEMPTED TO START THE AIRCRAFT WITH THE INTENTION OF CHARGING THE BATTERY AND TAXIING TO THE FUEL TANK FOR FUEL. THE AIRCRAFT WAS PARKED ON THE SOUTH TRANSIENT RAMP OVER THE NIGHTS OF 7/4/2015 AND 7/5/2015. THE AIRMAN STATED THAT THE BATTERY WAS EITHER WEAK OR DEAD AND THE AIRPLANE WOULD NOT START. HE STARTED THE PLANE BY HAND PROPPING THE ENGINE. AS HE ATTEMPTED TO BOARD THE AIRPLANE FROM THE REAR OF THE RIGHT WING, HE SAID THE AIRPLANE JUMPED THE CHOCK WHEN HE ADDED HIS WEIGHT TO THE STEP AND THE NOSE ELEVATED OVER THE CHOCK. THE AIRPLANE STARTED TO MOVE WITHOUT ANYONE ON BOARD CAME TO A STOP IN A DRAINAGE DITCH. THE DITCH IS LOCATED A SHORT DISTANCE TO THE WEST OF WHERE THE AIRPLANE WAS PARKED.
THE AIRMAN SUSTAINED MINOR ABRASIONS TO HIS NOSE, LEFT HAND KNUCKLES AND FOREARM AS A RESULT OF HIS SLIPPING OFF OF THE TRAILING EDGE OF THE WING.