What was found
LAVATORY SMOKE EICAS MESSAGE CAME ON IMMEDIATELY AFTER TAKEOFF. PERFORMED ENGINE RUNS AND LAVATORY SMOKE DETECTOR TEST WITH OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (K)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LAVATORY SMOKE EICAS MESSAGE CAME ON IMMEDIATELY AFTER TAKEOFF. PERFORMED ENGINE RUNS AND LAVATORY SMOKE DETECTOR TEST WITH OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (K)