As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE - LAVATORY DET. FAULT. FA PANEL SHOWS FORWARD LAV SMOKE DETECTOR INOP. CIDS RESET - NO CHANGE. FWD LAV LOCKED CLOSED. REMOVED AND REPLACED DEU B AT 300RH1, OPS CHECK NORMAL. CIDS-SDF 1 SMOKE DET LAV LOC 1L TEST OK. REFF AMM 26-17.