As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4437 THE CREW REPORTED A GALLEY SMOKE HORN ACTIVATED WHEN CLIMBING OUT AT 13,000 FEET. NO FIRE INDICATIONS WERE ON EICAS. THE CAPTAIN ELECTED TO RETURN TO LGA. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED LAVATORY SMOKE DETECTOR IAW EMB 135 AMM 26-14-01. THE OPERATIONAL CHECK WAS GOOD. COMPLIED WITH FCD EM 25049R1. TEMPER PROOF SEALANT. THE AIRCRAFT WAS RETURNED TO SERVICE.