As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BOI - DURING CLIMB, LAVATORY SMOKE ALARM SOUNDED. NO SMOKE WAS NOTED UPON INVESTIGATION. DEFERRED LAVATORY IAW MEL 26-7 (A/B). AIRCRAFT RETURNED TO SERVICE. MEL CLEARED ON 9/2 BY REPLACING THE SMOKE DETECTOR. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.