As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAV SMOKE INDICATION ON EICAS AFTER TAKEOFF. NO VISIBLE SMOKE WAS NOTED. REPLACED LAVATORY SMOKE DETECTOR PANEL AND LAVATORY SMOKE DETECTOR IAW EMB AMM 26-14-02 AND 26-14-01. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE, P/N FOR PANEL IS FAU-751A-4 S/N IS 043477. (M)