What was found
ON FLIGHT 3064 RIGHT AFTER TAKEOFF THE CREW REPORTED, RECEIVED A LAV SMOKE INDICATION MESSAGE ON EICAS. THE FLIGHT ATTENDANT REPORTED, SMELLED A STRANGE ODOR IN THE CABIN. THE CREW DECLARED AN EMERGENCY. THE FLIGHT DECK CREW DONNED OXYGEN MASK AND RETURNED TO SAN. NO SMOKE WAS VISIBLE ANYWHERE IN COCKPIT, LAV OR CABIN. THE AIRCRAFT LANDED WITHOUT INCIDENT. CRASH AND FIRE RESCUE CREW CAME IN AND COULD NOT FIND ANY HOT SPOTS OR ANYTHING THAT HAD SIGNS OF SMOKE OR ODOR. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED ENGINE NUMBER 2. FOUND EVIDENCE OF THE NUMBER 4 CARBON SEAL LEAKING. REMOVED AND REPLACED THE NUMBER 4 CARBON SEAL. THE AIRCRAFT WAS RETURNED TO SERVICE.