What was found
PILOT REPORTED, WHILE ON APPROACH, THE LEFT MAIN GEAR WOULD NOT ILLUMINATE DOWN AND LOCKED. UPON LANDING WITHOUT INCIDENT, MAINTENACNE INSPECTED LANDING GEAR. THE CANNON PLUGS IN THE LEFT GEAR WELL WERE CLEANED ALONG WITH THE SQUAT SWITCHES. A FUNCTIONAL CHECK OF THE SYSTEM WAS PERFORMED WITH ALL INDICATIONS NORMAL.