What was found
ON FLIGHT 3024 THE CREW REPORTED THE LAVATORY SMOKE WARNING CAME ON AFTER LIFT OFF. THE WARNING WENT OUT AFTER APPROXIMATELY 3 MINUTES. THE FLIGHT ATTENDANT TESTED THE SMOKE DETECTOR AND SYSTEM TESTED AS OK. THE CAPTAIN DECLARED AN EMERGENCY AND ELECTED TO RETURN TO LAX. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE NUMBER 2 CARBON SEAL ASSEMBLY IAW RRMM 72-25-25. PERFORMED ENGINE RUNS IAW RRMM 72-00-00. THE LEAK CHECK WAS GOOD. THE VIBRATION CHECK WAS GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.