As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO CDG DUE TO F/A'S REPORTING STRONG BURNING ODOR OBSERVED THROUGHOUT ACFT BUT WAS STRONGEST IN MID CABIN. MADE OVERWEIGHT LANDING 370K POUNDS. TOUCHDOWN AT LESS THAN 100 FPM DESCENT RATE. SMOOTH LANDING. INSPECTED CABIN, AIR SYSTEM, ENGINES, NO TROUBLE NOTED. PERFORMED IDLE AND HIGH POWER RUNS, COULD NOT DUPLICATE. DUE TO TEMP CONTROL VALVE MCO, BORROWING TEMP VALVE AND CONTROLLER. REPLACED SAME.