As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3807 PILOT REPORTED THE NR 1 SMOKE WARNING TEST FOR THE BAGGAGE COMPARTMENT UNIT WOULD NOT TEST. MAINTENANCE REMOVED AND REPLACED THE NR 1 SMOKE DETECTOR AND OPERATIONAL CHECKED THE SYSTEM. ALL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.