What was found
AFTER STARTING UP THE ACFT FOLLOWING THE LOADING A PATIENT, THE ENG CHIP LIGHT CAME ON, ABORTED THE START. THE PATIENT WAS SENT BY GND AMBULANCE & THE MECHANIC CAME OUT & CLEANED CHIP PLUGS, CHANGED ENG OIL FILTER & DID A 30 MIN GND RUN. RECHECKED THE CHIP PLUGS & FOUND THEM TO BE CLEAR WITH NO NOTICEABLE DEBRIS. THE ACFT WAS CLEARED FOR RETURN TO SERVICE IAW SERVICE MANUAL. THE PILOT THEN FLEW BACK TO KEVV & GOT ANOTHER ENG CHIP LIGHT WHILE HOVERING AT THE AIRPORT. THE PILOT IMMEDIATELY LANDED & CALLED MX AGAIN WHO DETERMINED THE ENG REQUIRED REPLACEMENT. THIS ACFT REMAINS OUT OF SERVICE AT THIS TIME AWAITING A SERVICEABLE ENG TO ARRIVE.