What was found
ON FLIGHT 3354 THE CREW REPORTED THAT A FEW SECONDS AFTER ROTATION THE FLIGHT ATTENDANT CALLED TO SAY SHE THOUGHT THERE WAS SMOKE IN THE CABIN AS SHE CALLED THE CREW GOT LAV SMOKE WARNING. COMPLETED THE CHECK LIST SHORTLY AFTER LANDING EICAS WARNING WENT OUT AND THE FLIGHT ATTEDNANT CALLED TO SAY SMOKE HAD CLEARED. THE CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND INSTALLED NR 2 ENGINE IAW WORKCARD 71-000-00 AND ACCOMPLISHED ETN-EM-72-034. LEAK AND OPS CHECK NORMAL, NO ABNORMAL SMELLS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.