As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)TAKEOFF REJECTED AFTER SMOKE DETECTOR SOUNDED IN LAV. E. SMOKE DETECTOR RESET. THERE WERE NO FURTHER INDICATIONS. BRAKE TEMP PEAKED AT 400 DEGREES "C". INVESTIGATION REVEALED ALARM ACTIVATED DUE TO PASSENGER SMOKING IN ADJACENT LAV. SMOKE DETECTORS OF LAVATORIES TESTED AND UNIT AT LAV. "E" REPLACED. ALSO REJECTED TAKEOFF AND HIGH ENERGY STOP INSPECTION CARRIED OUT.