As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2456. AFTER PARKING AIRCRAFT LAV SMOKE APPEARED ON ED FOR APPROXIMATELY 10 SECONDS THEN CLEARED. REMOVED FROM SERVICE. PERFORMED FUNCTIONAL TEST OF AFT LAV SMOKE DETECTOR REF E175 AMM 26-14-01-720-801-A. OPS TEXT GOOD. NFDN. COULD NOT DUPLICATE. NO PARTS REPLACED.