As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4333, THE CREW REPORTED THAT AFTER TAKEOFF AND GEAR RETRACTION THEY HEARD AN UNUSUAL NOISE AND RECEIVED A CONTINUOUS LEFT MAIN GEAR IN TRANSIT INDICATION ON EICAS. THE CREW DECLARED AN EMERGENCY, COMPLETED AOM VOL 1 CHECKLIST AND RETURNED TO JFK. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE PROXIMITY SWITCH IAW EMB-145 AMM 32-61-01. THE OPERATIONAL CHECK PER 32-63-05 WAS GOOD, NO DEFECT NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.