As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3982 CREW REPORTED THAT THE NR 2 BAGGAGE BAY SMOKE DETECTOR WOULD NOT TEST. ITEM WAS DEFERRED AFTER VERIFICATION THAT THE NR 1 WAS IN OPERATING ORDER. ONCE IN MAINTENANCE THE DETECTOR WAS REPLACED AND OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.