As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(AUS) RUDDER CONTROL SYSTEM SUBJECT TO TWO UNCOMMANDED INPUTS. INVESTIGATION FOUND EVIDENCE OF WATER/COFFEE CONTAMINATION OF THE FORWARD E&E BAY. CONTAMINATION WAS DUE TO REMOVAL OF THE AIRSTAIRS AND DRIP TRAY LOCATED ABOVE THE E&E BAY. SERVICE BULLETIN SB 737-25-1317 THEN CALLS FOR THE INSTALLATION OF A WATERSHIELD AND MOISTURE SHROUDS. THE SB WAS NEVER CARRIED OUT. PERSONNEL/MAINTENANCE ERROR.