As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) APU GENERATOR PUT ON MEL DUE TO FAILURE TO REMAIN ON LINE. ON GROUND TROUBLESHOOTING, INITIALLY COULD NOT DUPLICATE SNAG. FURTHER TROUBLESHOOTING AND REVEALED PIN & SOCKET DAMAGE TO APU GEN - FIREWALL DISCONNECT (D40228J). AS OF THE DATE OF THIS REPORT, APU STILL ON MEL AWAITING PARTS TO REPLACE THE CONNECTOR. UNSERVICABLE PARTS ARE IN QUARANTINE.