What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
T-6 tail wheel trainer/vintage aircraft was on a training mission at the grd airport. CFI and student were performing take off and landings. Aircraft touched down on mains, then as it settled onto the tail wheel after bleeding off speed, it veered to the left hard. CFI attempted to correct, but aircraft entered ground loop. Aircraft exited the side of the runway. Speed at runway exit as estimated by the pilot was at about 30 miles an hour. Main gear buckled and aircraft came to rest on belly damaging wingtip, aileron (hence the accident classification) and damage the propeller. Post accident inspection revealed a broke tail wheel bell crank that caused the aircraft to be uncontrollable after tail wheel touched down.
As the FAA filed it
T-6 TAIL WHEEL TRAINER/VINTAGE AIRCRAFT WAS ON A TRAINING MISSION AT THE GRD AIRPORT. CFI AND STUDENT WERE PERFORMING TAKE OFF AND LANDINGS. AIRCRAFT TOUCHED DOWN ON MAINS, THEN AS IT SETTLED ONTO THE TAIL WHEEL AFTER BLEEDING OFF SPEED, IT VEERED TO THE LEFT HARD. CFI ATTEMPTED TO CORRECT, BUT AIRCRAFT ENTERED GROUND LOOP. AIRCRAFT EXITED THE SIDE OF THE RUNWAY. SPEED AT RUNWAY EXIT AS ESTIMATED BY THE PILOT WAS AT ABOUT 30 MILES AN HOUR. MAIN GEAR BUCKLED AND AIRCRAFT CAME TO REST ON BELLY DAMAGING WINGTIP, AILERON (HENCE THE ACCIDENT CLASSIFICATION) AND DAMAGE THE PROPELLER. POST ACCIDENT INSPECTION REVEALED A BROKE TAIL WHEEL BELL CRANK THAT CAUSED THE AIRCRAFT TO BE UNCONTROLLABLE AFTER TAIL WHEEL TOUCHED DOWN.