As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)DURING A 100 HOUR INSPECTION WHITE RESIDUE WAS NOTED ON THE RIGHT HAND RUDDER BAR SADDLE. UPON REMOVAL THE SADDLE HALVES WERE FOUND TO BE CORRODED. THE SUPPORTING STRUCTURE, FIG. 31 #34 CESSNA 172 PAR TS MANUAL, WAS ALSO FOUND CORRODED.