As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE REST UPPER DOOR 4 MESSAGE CAUTION LIGHT CAME ON. VERIFIED WITH FA, NO SMOKE IN FA REST AREA. WARNING MESSAGE WENT AWAY WITHIN 2 MINUTES. COULD NOT DUPLICATE PROBLEM OPS CHECK GOOD OF CREW REST AREA SMOKE DETECTORS IAW AMM 26-14-00.