As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEN NR 1 BUS FAIL ON NR 1 ENG START UP. GROUNDED - YES. ACCOMP NR 1 GCU BITE FOUND FAULT GCU/ APB FAULT RESET NR 1 GCU. OPEN P91 AND ACCOMP GVI NO DEFECTS OF GCB NR 1 (C801) CLOSED P91. CYCLED C/B AT P6-4 F-10. ACCOMP OPS TEST FOR A/C GENERATION AND CONTROL SYSTEM ALL PASS GROUND TESTS REF MM 20-60-01-860-801, 24-21-00-700-803 & FIM 24-21 TASK 801 & 807.