As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAME CAME OUT OF SERVICE OUTLET AFTER SWITCHING TO EXTERNAL POWER BY DOOR 1L. ELECTRICAL OUTLET AT DOOR 1 LEFT WAS FOUND MELTED. OUTLET WAS REPLACED AND OP CHECKED GOOD. ENGINEERING WILL EVALUATE THE ELECTRICAL OUTLET TO LOOK FOR POSSIBLE DEFECTS. ENGINEERING ALSO CREATED CALLOUT EG3435 TO CHECK DOOR 1 LEFT SERVICE OUTLET WIRING TO LOOK FOR ANY POSSIBLE CAUSES.