What was found
LHR FLIGHT DECK CREW REST SMOKE DETECTOR FAILED CABIN SYSTEM CONTROL PANEL FUNCTIONAL TEST. REPLACED FLIGHT DECK CREW REST SMOKE DETECTOR. SYSTEM GROUND CHECKED NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LHR FLIGHT DECK CREW REST SMOKE DETECTOR FAILED CABIN SYSTEM CONTROL PANEL FUNCTIONAL TEST. REPLACED FLIGHT DECK CREW REST SMOKE DETECTOR. SYSTEM GROUND CHECKED NORMAL OPERATION.