What was found
LHR - AFT RIGHT LAVATORY SMOKE DETECTOR WENT OFF FOR SHORT TIME. FLIGHT LANDED LHR WITHOUT INCIDENT. REPLACED SMOKE DETECTOR. SYSTEM GROUND CHECK NORMAL OPERATION.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
LHR - AFT RIGHT LAVATORY SMOKE DETECTOR WENT OFF FOR SHORT TIME. FLIGHT LANDED LHR WITHOUT INCIDENT. REPLACED SMOKE DETECTOR. SYSTEM GROUND CHECK NORMAL OPERATION.