As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHILE SITTING AT THE GATE WITH PASSENGERS ONBOARD THE FLIGHT CREW REPORTED A POWER INTERUPTION WITH THE APU RUNNING AND NUMEROUS BREAKERS POPPED. FLIGHT ATTENDANTS REPORTED SPARKS COMING OUT OVER THE OVERHEAD BIN AREA AT SEAT ROW 16D ALONG WITH AN ELECTRICAL BURNING SMELL. THE FLIGHT CREW HAD ALL OF THE PASENGERS DEPLANE THROUGH THE L1 DOOR. **SUPPLEMENTAL REPORT WILL BE SUBMITTED** (OPEN)