As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AC1 AUTOTRANSFER AND AC2 AUTOTRANSFER CAUTION MSG`S ON GROUND. WILL NOT ACCEPT EXT AC PWR. WILL NOT ACCEPT GEN PWR. MAIN GEN`S WON`T SUPPLY OPPOSITE SIDE. R & R GCU NR 3 IAW AMM 24-11-07. PERFORMED OPS CHECK IAW 24-22-01. OPS CK GOOD AT THIS TIME.