What was found
RIVET HEAD FOUND MISSING ON BOTTOM OF RT STABILATOR. INSPECTION REVEALED THE AREA IN FRONT OF SPAR ON BOTH LT AND RT STABILATOR WERE FILLED WITH MOUSE NESTING DEBRIS. ACCESS COULD ONLY BE MADE BY REMOVING BOTH TIP RIBS. CORROSION WAS LIGHT, BUT ALL BOTTOM RIVETS ALONG SPAR ON RT SIDE WERE REPLACED. THIS AIRCRAFT IS STORED IN A CLOSED HANGAR WITH A CONCRETE FLOOR. THE POTENTIAL PROBLEMS FROM THIS CONDITION GOING UNNOTICED ARE SEVERE, SO LOOK SHARP!