What was found
FLIGHT FROM PERTH TO MELBOURNE, AUSTRALIA, PILOT DISCOVERED ELEVATOR/TRIM SYSTEM INOPERATIVE WHEN AN ATTEMPT TO SEEK A LOWER ALTITUDE. APPEARED AS THOUGH THE ELEVATOR SYSTEM WAS FROZEN. THE SYSTEM BECAME FREE AT A LOWER ALTITUDE AND A SAFE LANDING WAS MADE. DURING A POST-FLIGHT INSPECTION, EXAMINATION OF THE COMPLETE TAIL COMPARTMENT ELEVATOR SYSTEM REVEALED NO DEFECTS OR ABNORMALITIES THAT WOULD CAUSE THE PROBLEM. THE TWO PREVIOUS DAYS IN PERTH, THE AIRCRAFT WAS PARKED OUTSIDE IN TWO FULL DAYS OF HEAVY RAINS. IT IS SUBMITTER'S CONTENTION THAT WATER MADE ITS WAY INTO THE BUNGEE (BEARING PN 1159C20157 AT FLIGHT STATION 765) MECHANISM; THUS, FREEZING AT ALTITUDE WHICH WOULD IMPEDE ELEVATOR/TRIM OPERATIONS.