As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LEFT AFT LAVATORY SMOKE DETECTOR PRESENTED 2 FALSE WARNINGS OF 1-2 SECOND DURATION DURING CLIMB AND CRUISE. MAINTENANCE FOUND SMOKE DETECTOR FILTER CLOGGED, CLEANED FILTER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 26-12-00.