As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER A FLIGHT FROM CPK TO FRANKFORT, KY, PILOT TRIED TO START THE RIGHT ENGINE AND IT WOULD NOT START. A MECHANIC TRIED TO START IT ALSO AND ONLY THE STARTER MOTOR WOULD SPIN. THE MECHANIC REMOVED THE STARTER GEAR AND FOUND THE TEETH GONE. ENGINE WAS PLACED ON ORDER FOR REPLACEMENT.