As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PIT - FLT 1450 - AFTER GEAR EXTENSION, CAPTAIN RECEIVED ALL THREE GREEN LIGHTS BUT HAD THE LEFT LANDING GEAR DOWNLOCK SWITCH MESSAGE. CAPTAIN RECYCLED THE GEAR WITH NO CHANGE. LIGHT WENT OUT PRIOR TO TOUCHDOWN. NO EMERGENCY WAS DECLARED AND THE FLIGHT MADE A NORMAL LANDING. MAINTENANCE REPLACED THE LEFT MLG PRIMARY DOWNLOCK SENSOR. (M)