As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MOMENTARY SMOKE TOILET CAUTION IN CRUISE. MSG CLEARED BEFORE QRH COULD BE OPENED. FA REPORTS LAV WAS OCCUPIED. AFTER PAX LEFT, NO EVIDENCE OF SMOKE. SMOKE DETECTOR INTERMITTENTLY GOING OFF AT THE GATE WITH NO EVIDENCE OF SMOKE. REF 318051/4 FOR MEL. REMOVED & REPLACED LAV SMOKE DETECTOR IAW AMM 26-16-01 OP CHECKS GOOD REMOVE FROM MEL REMOVED PLACARD.