As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED SMOKE COMING OUT OF SEATS 13 D&E IN FLIGHT. FLIGHT ATTENDANT DISCHARGED TWO FIRE EXTINGUISHERS, THE AIRCRAFT DIVERTED TO DEN WHERE IT LANDED SAFELY WITH NO FURTHER INCIDENT. MAINTENANCE DETERMINED THAT THE SOURCE WAS THE POWER PORTS ON SEAT 13DEF. AIRCRAFT WAS GROUNDED. MAINTENANCE INSTALLED IN SEAT POWER SUPPLY IAW CMM 25-22-52 AND AMM 25-21-11.