What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Mr. Mosimann was receiving dual instruction for the purpose of adding airplane single engine land to an already existing commercial pilot certificate. Mr. Vanvoorhis was the instructor and pilot in command of the flight. Mr. Vanvoorhis stated that the student was having difficulties with the use of the brakes and he decided to let him practice by taxiing up and down the runway 27. Mr. Vanvoorhis stated that on the first practice taxi down the runway, Mr. Mosimann applied uneven braking and the aircraft veered sharply to the right and started to ground loop. The aircraft went part way around, came up on its nose and then over on its back.
As the FAA filed it
(-23) MR. MOSIMANN WAS RECEIVING DUAL INSTRUCTION FOR THE PURPOSE OF ADDING AIRPLANE SINGLE ENGINE LAND TO AN ALREADY EXISTING COMMERCIAL PILOT CERTIFICATE. MR. VANVOORHIS WAS THE INSTRUCTOR AND PILOT IN COMMAND OF THE FLIGHT. MR. VANVOORHIS STATED THAT THE STUDENT WAS HAVING DIFFICULTIES WITH THE USE OF THE BRAKES AND HE DECIDED TO LET HIM PRACTICE BY TAXIING UP AND DOWN THE RUNWAY 27. MR. VANVOORHIS STATED THAT ON THE FIRST PRACTICE TAXI DOWN THE RUNWAY, MR. MOSIMANN APPLIED UNEVEN BRAKING AND THE AIRCRAFT VEERED SHARPLY TO THE RIGHT AND STARTED TO GROUND LOOP. THE AIRCRAFT WENT PART WAY AROUND, CAME UP ON ITS NOSE AND THEN OVER ON ITS BACK.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.