As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT/OAJ - FLT 5173 - DURING TAXI-OUT AT CLT, THE BAGGAGE BAY SMOKE DETECTOR WENT OFF. NO SMOKE WAS NOTED. PASSENGERS WERE DE-PLANED. EMERGENCY PROCEDURES WERE DECLARED (PRECAUTIONARY). MAINTENANCE REMOVED AND REPLACED THE BAGGAGE BAY SMOKE DETECTOR. SYSTEM OPS CHECKED GOOD. (X)