As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE DEPLANING GROUND POWER WAS PLUGED IN UPON WHICH SMOKE WAS SEEN FROM THE COCKPIT. THE AIRCRAFT WAS ON INTERNAL POWER. NO SMOKE IN CABIN. F/O INITIATED EMERGENCY EVAC. POSSIBLE ARCING BETWEEN THE GROUND POWER RECEPTACLE AND THE GPU CORD, 2 TO 3 FOOT FLAMES AROUND THE GROUND POWER RECEPTACLE WERE PUT OUT WITH A NEARBY FIRE EXTINGUISHER. MX R2 TRU PS 31, 32, 33, 34.