As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB THE FLIGHT CREW GOT A BAGGAGE COMPARTMENT FIRE MESSAGE ON EICAS. AIRCRAFT RETURNED TO PIT. MAINTENANCE INSPECTED AND DEFERRED BAGGAGE COMPARTMENT SMOKE DETECTION SYSTEM. AIRCRAFT FLEW FROM PIT TO STL AND MAINTENANCE INSPECTED AND REMOVED AND REPLACED THE NR 2 DAU. SYSTEM OPS CHECKED GOOD.