As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED VERY HOT AIR FROM VENT AT SEAT 1A IN 1ST CLASS. 2ND CALL CREW REPORTED BURNING SMELL. DIVERSION, CHECKED THE AREA WITH A THERMAL IMAGING CAMERA, SEAT BOTTOM WAS REMOVED & THE EXPOSED IFE CONTROL BOX WAS IDENTIFIED AS HOT AT 47C WHICH WAS NOTICEABLY WARMER WITH A FAINT ODOR. NO OTHER HOT SPOTS IDENTIFIED. REPLACED SEAT POWER MODULE IAW AMM 23-81-08. OPERATIONS CHECKED NORMAL.