As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3545 THE CREW REPORTED THAT ON CLIMBOUT AFTER TAKEOFF, THEY RECEIVED AN EICAS MESSAGE "BAGGAGE DOOR OPEN" AND A RED DOOR OPEN INDICATION ON THE MFD. THE CREW DECLARED AN EMERGECNY AND RETURNED TO MIA. AIRCRAFT LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. ADJUSTED BAGGAGE DOOR SWITCHES IAW AMM 52-76-01. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.