What was found
ENGINE FIRE WARNING IN FLIGHT, APPROX 5 MINS AFTER TAKEOFF EXPERIENCED AN ENGINE FIRE WARNING WHICH WAS DETERMINED TO BE AN INDICATION PROBLEM. DIVERSION TO TEB HAD ALREADY BEEN INITIATED WHERE A PRECAUTIONARY LANDING MADE. PILOT REPORTED AFTER APPROX 5 MINS, ALARM STOPPED, ALL ENG INDICATIONS WITHIN SAFE OPS PARAMETERS. INSPECTED ENG BAY AND ENG COMPS. NO SIGNS OF OVERHEATING. INSPECTED FIRE LOOP. NO DAMAGE FOUND. SUSPECTED WATER INGRESS. ACCESSED MAIN CIRCUIT BREAKER & AVIONICS CIRCUIT BREAKER. NO DEFECTS NOTED. ACCESSED TO JC090/PC090 BEHIND PS KICKPLATE. INSPECTED CONNECTORS. MOISTURE PRESENT. WATER STAINS ON SURROUNDING STRUCTURE. CLEANED CONNECTORS & APPLIED CIC. STOWED CONNECTORS. INSPECTED WIRING HARNESS BEHIND GLARE SHIELD. NO DEFECTS NOTED. POWERED ON ALL SYS. NO ALARMS PRESENT. POWERED DOWN ACFT. INSPECTED PILOT SIDE WINDSCREEN. NO DEFECTS NOTED. WATER RUNNING FROM PILOT SIDE FRESH AIR VENT INLET. INSPECTED PS AIR VENT. EXCESSIVE WATER STAINS. INSPECTED VENT TUBE. EVIDENCE OF POOLING WATER. RECONNECTED VENT TUBE. NO DEFECTS NOTED IN ENG OVERSPEED, FUEL INDS OR CABIN LIGHTS SYS. ALL WORK PERFORMED IAW WIRING DIAGRAM 26-10-01-05, 28-40-01-03-01, 34-10-05-02-01, & 33-20-01-06-01. TURBOPROP STANDARD PRACTICES MANUAL 20-30-05, & STANDARD PRACTICES.