What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Student pilot and flight instructor were doing a mock private pilot check ride. This instructor had never flown with the student before. Student was scheduled to do his actual private pilot check ride the next day. Student was performing a short field approach and landing at the time of the incident. Both pilots stated the aircraft got slow during the flair/round out and that they were still high. Student stated he felt the aircraft was going to stall so he added power. Instructor stated the student added a lot of power, almost full power, so he believed the student was executing a go around. Both student and instructor stated the student had left aileron in for some reason and the aircraft entered a left bank and the left wing struck the runway. Aircraft veered to the left, away from the runway. It was about this time the instructor took control of the aircraft. Due to the rapid onset of the sequence of events, the instructor was unable to take control of the aircraft in a timely manner and didn't take control of the aircraft until after the loss of control. Instructor decided they were too slow to go around and their safest course of action was to land the aircraft in the grass next to the runway. Both pilots stated the event happened very fast and neither one of the pilots knew or felt that they had struck the runway with the wing.
As the FAA filed it
STUDENT PILOT AND FLIGHT INSTRUCTOR WERE DOING A MOCK PRIVATE PILOT CHECK RIDE. THIS INSTRUCTOR HAD NEVER FLOWN WITH THE STUDENT BEFORE. STUDENT WAS SCHEDULED TO DO HIS ACTUAL PRIVATE PILOT CHECK RIDE THE NEXT DAY. STUDENT WAS PERFORMING A SHORT FIELD APPROACH AND LANDING AT THE TIME OF THE INCIDENT. BOTH PILOTS STATED THE AIRCRAFT GOT SLOW DURING THE FLAIR/ROUND OUT AND THAT THEY WERE STILL HIGH. STUDENT STATED HE FELT THE AIRCRAFT WAS GOING TO STALL SO HE ADDED POWER. INSTRUCTOR STATED THE STUDENT ADDED A LOT OF POWER, ALMOST FULL POWER, SO HE BELIEVED THE STUDENT WAS EXECUTING A GO AROUND. BOTH STUDENT AND INSTRUCTOR STATED THE STUDENT HAD LEFT AILERON IN FOR SOME REASON AND THE AIRCRAFT ENTERED A LEFT BANK AND THE LEFT WING STRUCK THE RUNWAY. AIRCRAFT VEERED TO THE LEFT, AWAY FROM THE RUNWAY. IT WAS ABOUT THIS TIME THE INSTRUCTOR TOOK CONTROL OF THE AIRCRAFT. DUE TO THE RAPID ONSET OF THE SEQUENCE OF EVENTS, THE INSTRUCTOR WAS UNABLE TO TAKE CONTROL OF THE AIRCRAFT IN A TIMELY MANNER AND DIDN'T TAKE CONTROL OF THE AIRCRAFT UNTIL AFTER THE LOSS OF CONTROL. INSTRUCTOR DECIDED THEY WERE TOO SLOW TO GO AROUND AND THEIR SAFEST COURSE OF ACTION WAS TO LAND THE AIRCRAFT IN THE GRASS NEXT TO THE RUNWAY. BOTH PILOTS STATED THE EVENT HAPPENED VERY FAST AND NEITHER ONE OF THE PILOTS KNEW OR FELT THAT THEY HAD STRUCK THE RUNWAY WITH THE WING.