What was found
AFTER DEPARTURE, THE LEFT MAIN GEAR UNSAFE LIGHT REMAINED ILLUMINATED ON THE CENTER PANEL AFTER GEAR RETRACTION. THE ASSOCIATED LIGHT WAS EXTINGUISHED ON THE SECOND OFFICERS PANEL. COMPLETED THE LANDING GEAR UNSAFE. FOUND OIL ON LT PROXIMITY SWITCH CONNECTORS, CLEANED AND RESECURED. SYSTEM OPERATES NORMALLY IAW 32-61-00.