As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AC INVERTER FAILED AND CB POPPED, RESET ONCE POPPED AGAIN WHEN ADDED T/O PWR. ABORTED T/O. SECURED NR 1 CONNECTOR, FOUND NR 1 CONNECTOR LOOSE & SECURED CONNECTOR. SYSTEM TESTED IAW CE 560 MM CHAP 24-20-04. SWAPPED INVERTERS FOR FURTHER TROUBLESHOOTING PURPOSES. PC251-123H/ S/N 13764 NOW IN NR 2 POSITION S/N 14504 NOW IN NR 1 POSITION.