What was found
FLIGHT CREW REPORTED THAT THE AFT CARGO FIRE WARNING INDICATION ILLUMINATED. THE AFT CARGO FIRE BOTTLES WERE DEPLOYED. THE AIRCRAFT DECLAIRED AN EMERGENCY AND LANDED WITHOUT INCIDENT. NO EVIDENCE OF A FIRE WAS FOUND. THE AIRCRAFT WAS GROUNDED. DURING TROUBLESHOOTING PROCEDURES, AVIONICS MTC FOUND THE MOISTURE TRAY ABOVE THE EQUIPMENT RACK WAS CRACKED AND THERE WAS EVIDENCE OF FLUIDS DRAINING THROUGH THE CRACK AND ONTO THE CONNECTORS INSTEAD OF FLOWING DOWN THE COLLECTION TUBE, CAUSING A SHORTED CIRCUIT AND INDICATING A FALSE FIRE WARNING. THE MOISTURE SHROUD WAS REMOVED AND REPLACED AS WELL AS THE CORRODED CONNECTORS.