As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EICAS MESSAGE "SMOKE REST UPPER DR4" DISPLAYED ENROUTE. FLIGHT ATTENDANTS REPORT NO SMOKE IN BUNK AREA. MAINTENANCE FOUND NO SMOKE AND NO STATUS MESSAGE AND NO CORRELATED MAINTENANCE MESSAGE PER FIM 26-10-F4-24A-421A.