As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2071 - THE CREW REPORTED AN INTERMITTENT SMOKE WARNING IN CRUISE FLIGHT. THERE WAS NO EVIDENCE OF SMOKE. MAINTENANCE INSPECTED THE AIRCRAFT AND REPLACED THE NR 1 AFT CARGO PIT FIRE DETECTOR. OPERATIONAL CHECKS WERE GOOD AND THE AIRCRAFT WAS RETURNED TO SERVICE.