As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORT ELEC GEN SYS STATUS MSG DISPLAYED, ALSO ELEC BUS ISOLATION LT & ELEC BUS ISOLATION RT ADVISORY MSGS DISPLAYED. REPLACED RT GCU & BPCU IAW MM24-41-05, 24-22-02. CONFIRMED S-W LOAD OKAY. RAN ELECT SYS CHECK WITH EXT POWER, APU & ENGS. FREQS VOLTS & LOAD CHECKED GOOD. GEN & BUS CTL & IND CHECKS GOOD, NO FAULTS NOTED. CONFIRMED BOTH ENG IDG & BUGS OIL SVC WERE GOOD.