As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA FLIGHT NR 2324: NR 2 AFT BAGGAGE SMOKE DETECTOR FAILS TO TEST. AIRCRAFT RETURNED TO BLOCK. MAINTENANCE C/W OPS TEST OF THE AFT BAGGAGE SMOKE DETECTORS IAW AMM 26-12-06-710-801. OPS CHECK GOOD. NO DEFECTS NOTED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.