As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - CREW REPORTED RECIRCULATION FAN STATUS MESSAGE DISPLAYED. ELECTRICAL SMELL REPORTED IN CABIN AT TIME OF STATUS MESSAGE. FLIGHT LANDED LHR WITHOUT INCIDENT. DEFERRED UPPER AFT RECIRCULATION FAN INOPERATIVE PER MEL. REPLACED AFT UPPER RECIRCULATION FAN AT DFW ON 07/16/2011. SYSTEM GROUND CHECK NORMAL OPERATION.