As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SBP - LAVATORY SMOKE WARNING ALONG WITH MASTER WARNING SOUNDED IN CRUISE AND THEN SELF EXTINGUISHED AFTER ABOUT ONE SECOND. MAINTENANCE CLEANED LAVATORY SMOKE DETECTOR. OPS CHECK WAS GOOD IAW SAAB AMM 26-13-00. NO FURTHER ACTION REQUIRED. AIRCRAFT WAS THEN RETURNED TO SERVICE. (M)