What was found
LEFT MAIN LANDING GEAR UNSAFE INDICATION ON DURING LANDING. THE BULB TEST WAS GOOD AND THE INTRANSIT LIGHT WORKED NORMALLY. RECYCLED THE GEAR AND THE ONLY ABNORMAL INDICATION WAS THE LEFT MAIN GEAR CONFIG LIGHT THAT CAME ON AND STAYED ON THROUGH LANDING. ALSO, UNABLE TO SILENCE THE CONFIG WARNING WITH THE GPWS FLAP OVERRIDE SWITCH. FOUND LEFT MAIN LANDING GEAR DOWNLOCK SWITCH CANNON PLUG LOOSE AT JUNCTION 5GA-S1. RESEATED CANNON PLUG AND PERFORMED LANDING GEAR SWING CHECKS.