As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: MID LAVATORY SMOKE ALARM VISUAL/LIGHT ON BUT NO AUDIO. MAINTENANCE ACCOMPLISHED INTERFACE AND POWER UP TEST OF THE CIDS PER AMM 23-73-00 WITH NO ISSUES NOTED. MAINTENANCE ACCOMPLISHED BITE TEST OF THE SMOKE DETECTION FUNCTION PER AMM 26-10-00 WOTH NOI ISSUES NOTED. MAINTENANCE PERFORMED OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION SYSTEM PER AMM 26-17-00 WITH NO ISSUES NOTED. MAINTENANCE COULD NOT DUPLICATE FAULT.