As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE AIRCRAFT 806EX WAS IN MANCHESTER NEW HAMPSHIRE CREW NOTED THAT THE LAVATORY SMOKE ALARM WAS ACTIVATED AND WOULD NOT EXTINGUISH. CREW THEN COMPLIED WITH MEL BY PULLING C/B AND PLACARD LAV AS REQUIRED. LATER LAQUARDIA MAINTENANCE REMOVED AND REPLACED LAVATORY SMOKE ALARM AND OPERATIONAL CHECK WAS GOOD.