As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX - PASSENGER ADAPTER APPEARED TO SMOKE AFTER A FEW MINUTES OF USE. UNABLE TO DETERMINE IF POWER PORT OR ADAPTER WAS THE PROBLEM. PASSENGER STOPPED USING POWER PORT AND SMOKE WENT AWAY. REPLACED POWER SUPPLY AND JUNCTION BOX. SYSTEM GROUND CHECKED NORMAL OPERATION.