What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Mr. Koff was giving instruction to a student working towards a tail wheel endorsement. On landing roll, after touchdown, student tried to make a minor correction with the rudder, but accidently applied pressure to the left toe-brake as well. This caused the airplane to yaw to the left much more quickly than was anticipated, causing the left wing to be low and the right wheel off the ground, causing the aircraft to ground loop. Mr. Koff called for the addition of power, but the student did not respond. Mr. Koff stated he was unable to apply power due to the student covering the throttle. Mr. Koff assisted the student in controlling the aircraft, and allowed the aircraft to depart the runway. Block 31: atqa will not accept pilot certificate number, 2159826
As the FAA filed it
MR. KOFF WAS GIVING INSTRUCTION TO A STUDENT WORKING TOWARDS A TAIL WHEEL ENDORSEMENT. ON LANDING ROLL, AFTER TOUCHDOWN, STUDENT TRIED TO MAKE A MINOR CORRECTION WITH THE RUDDER, BUT ACCIDENTLY APPLIED PRESSURE TO THE LEFT TOE-BRAKE AS WELL. THIS CAUSED THE AIRPLANE TO YAW TO THE LEFT MUCH MORE QUICKLY THAN WAS ANTICIPATED, CAUSING THE LEFT WING TO BE LOW AND THE RIGHT WHEEL OFF THE GROUND, CAUSING THE AIRCRAFT TO GROUND LOOP. MR. KOFF CALLED FOR THE ADDITION OF POWER, BUT THE STUDENT DID NOT RESPOND. MR. KOFF STATED HE WAS UNABLE TO APPLY POWER DUE TO THE STUDENT COVERING THE THROTTLE. MR. KOFF ASSISTED THE STUDENT IN CONTROLLING THE AIRCRAFT, AND ALLOWED THE AIRCRAFT TO DEPART THE RUNWAY. BLOCK 31: ATQA WILL NOT ACCEPT PILOT CERTIFICATE NUMBER, 2159826