What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) While under the supervision of an instructor pilot, a student pilot was cold inflating the balloon envelope. A ground crew person wrapped a ground handling rope around his hand. The tail of the ground handling rope was pulled into the fan, causing the rope to jerk the person's hand hard enough to severe his thumb. The person was wearing gloves, so the severed thumb was saved and was ultimately reattached.
As the FAA filed it
(-23) WHILE UNDER THE SUPERVISION OF AN INSTRUCTOR PILOT, A STUDENT PILOT WAS COLD INFLATING THE BALLOON ENVELOPE. A GROUND CREW PERSON WRAPPED A GROUND HANDLING ROPE AROUND HIS HAND. THE TAIL OF THE GROUND HANDLING ROPE WAS PULLED INTO THE FAN, CAUSING THE ROPE TO JERK THE PERSON'S HAND HARD ENOUGH TO SEVERE HIS THUMB. THE PERSON WAS WEARING GLOVES, SO THE SEVERED THUMB WAS SAVED AND WAS ULTIMATELY REATTACHED.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.