What was found
AFTER PICKING UP THE PATIENT, ABOUT 3 MINS AFTER DEPARTURE, THE ENG 1 CHIP CAUTION LIGHT ILLUMINATED DURING CRUISE FLIGHT AT 1000’ ABOVE GND LEVEL. CONDUCTED THE ACFT CHECKLIST ACTIONS & DECLARED AN EMER WITH THE INTENT TO CONDUCT A PRECAUTIONARY LANDING. THE CHIP LIGHT THEN DISAPPEARED WITH ABOUT 2 NAUTICAL MILES TO LAND & CAME ON AGAIN APPROX 1 MIN LATER. LANDED CLEAR OF THE MAIN RNWY & CONDUCTED A NORMAL SHUTDOWN. THE MECHANIC CONDUCTED MX THAT REVEALED NO FERROUS MATERIAL ON EITHER OF THE CHIP DETECTORS & A PHANTOM LIGHT WAS SUSPECTED. AFTER THE GND RUN LEAK CHECK THE ACFT WAS SIGNED UP AS AIRWORTHY. FLEW THE ACFT BACK TO OUR BASE & THEN DEBRIEFED WITH THE CREW.