As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE REST UPPER DR 4 CAUTION SMOKE IS DETECTED IN THE UPPER CREW REST COMPARTMENT AT DOOR 4. F/A REST SMOKE ALERT. NO SMOKE PRESENT. CHECKED ALL FAULT HYSTORY AND PRESENT LEG FAULTS NO FIND MESSAGE CORRELATED TO FAULT IN OVERHEAD FLIGHT ATTENDANT REST SMOKE DETECTION SYSTEM. ADDITIONALLY PERFORMED OVERHEAD FLIGHT ATTENDANT REST SMOKE DETECTION - OPERATIONAL TEST IAW AMM DMC-B787-A-26-14-20-00B-320A-A TEST OK. GOOD FOR SERVICE.