As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM, SMOKE ODOR WAS DETECTED IN THE CABIN FROM THE SEATS 1 AND 2 GRID. THE FORWARD SIDEWALL OF ELECTRICAL / ELECTRONIC COMPARTMENT FROM STATIONS 110 TO 218 WAS OPENED DETECTING THE CAPTAIN FLOOR BURNED AND STRONG SMOKE ODOR IN 3 TEMPERATURE CONTROLLERS. THE WINDOWS AND WINDSHIELDS ANTI-FOG TEMPERATURE CONTROLLERS WERE REPLACED IAW MM 30-41-01 AND WIRING WAS CHECKED IAW WDM 20-50-01, TESTED CORRECT.