As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY WHITE SMOKE FROM POWER PORT AT SEAT 7D/E. SMOKE STOPPED AFTER POWER TURNED OFF. FOUND LIQUID DAMAGE. REMOVED AND REPLACED SEAT POWER BOX AT 7DEF IAW AMM 44-22-44-000-801 (AALA201703179018) AND AC OUTLET UNIT AT 7D IAW AMM 44-22-43-000-801. OPERATIONAL CHECKED GOOD. AIRCRAFT WAS GROUNDED.