As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - INFLIGHT CDG-DFW. CREW REPORTED STRONG ODOR OF BURNING RUBBER IN CABIN AND COCKPIT. EMERGENCY DECLARED FLIGHT DIVERTED LHR LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED SEAL AND TIGHTENED NUT ON HOT AIR SUPPLY TUBE. SYSTEM GROUND CHECK NORMAL OPERATION.