As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPERATOR THAT ROLL CONTROL BECAME RESTRICTED AND DIFFICULT DURING FLIGHT. INVESTIGATION REVEALED THAT THE PRIMARY ROLL SERVO WAS FOUND TO BE CAUSING RESTRICTION TO CAPSTAN. THIS SERVO WAS REMOVED AND HAS AUDIBLE SOUND OF OBJECTS FLOATING LOOSE INTERNALLY.