What was found
AIR RETURN, ENROUTE, PILOTS REPORTED THAT THE NR 1 ENGINE FIRELOOP ANNUCIATOR AND T-HANDLE FLICKERED. AIRCRAFT RETURNED TO DEPARTURE AND A SUBSEQUENT FERRY FLIGHT WAS PERFORMED FOR REPAIRS. MAINTENANCE INSPECTED THE AFFECTED SYSTEM AND DISCOVERED A SHORTED WIRE ON THE LT FIRELOOP. UPON FURTHER INSPECTION, NO SHORT NOTED, REPOSITIONED FIRELOOP AND RE-SECURED LOOSE CONNECTOR IAW MM 20-13. OPERATIONAL CHECK OF SYS OK.