As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3250 DISC: DURING DEPLANING GROUND CREW REPORTED SPARKS AND SMOKE AT GROUND POWER CONNECTION. POWER TURNED OFF BY GROUND CREW AND PILOT STARTED APU. INSPECTED PINS ON BOTH AIRFRAME AND RECEPTICAL. NTF. PLACE ON MEL 24-41-01B FOR PRECAUTION. "M" PROCEDURE C/W. PLAC INSTALLED. INSPECTED EXT PWR RECEPTACLE. NO DEFECTS NOTED. PERFORMED OPS CHECK. OPS CHECK GOOD. ALL IAW A320 AMM 24-41. REVERSED "M" PROCEDURES. MEL/PLACARD REMOVED.