As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AFTER TAKEOFF THROUGH 5000 FEET, BAGGAGE FIRE WARNING CAME ON, BLEW BOTH BOTTLES, AND AIR RETURNED TO DAY. MEL'D BAGGAGE COMPARTMENT AND CONTINUED FLIGHT TO EWR. EWR MAINTENANCE INSPECTED BAGGAGE COMPARTMENT FOR EVIDENCE OF SMOKE OR FIRE. NONE NOTED. PERFORMED TEST OF BAGGAGE COMPARTMENT SMOKE DETECTION SYSTEM, CHECKED GOOD. REMOVED AND REPLACED BOTH FIRE EXTINGUISHER BOTTLES (PART NUMBER: 33700027-1) IAW EMB145 MM 26-23-01. CLEARED MEL AND RETURNED THE AIRCRAFT TO SERVICE.