As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELEC SPARKING IN COCKPIT WHEN WE TRY TO CONNECT GND POWER, ALSO ELEC BURN SMELL. INSPECTED AIRCRAFT IAW 05-51-26-800-801C1. FOUND EXTERNAL POWER RECEPTACLE AT FAULT. SEE ATTACHED 44.0008 & NR,S 4618644 THRU 4618659 FOR WORK ACCOMPLISHED TO REPAIR DAMAGE.