What was found
PILOT REPORTED ENGINE WOULD NOT SHUTDOWN WITH MIXTURE LEAN, UPON INSP OF CAUSE, FOUND MIXTURE STOP PIN MISSING AND HAD FALLEN OUT DURING OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
PILOT REPORTED ENGINE WOULD NOT SHUTDOWN WITH MIXTURE LEAN, UPON INSP OF CAUSE, FOUND MIXTURE STOP PIN MISSING AND HAD FALLEN OUT DURING OPERATION.