As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU - GROUND INTERRUPTED DUE TO ELECTRICAL SMOKE 28DEF SIDEWALL VENT FOLLOWED BY FLAME. FIRE EXTINGUISHER USED IN CABIN. FOUND BEHIND LOWER SIDEWALL PANEL POWER PORT CONNECTOR DAMAGED. REPLACED TWO POWER PORT HARNESSES ON THE SIDEWALL BETWEEN ROWS 27-29DEF. REPLACED AFT CABIN FIRE EXTINGUISHER. SYSTEM GROUND CHECKED NORMAL OPERATION.