As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AT CRUISE RECEIVED A/C ESS BUS CAUTION MSG MOMENTARY, CB PANEL 1 CB C2 POPPED A/C ESS BUS XFER TO AC BUSS 2 ALONG WITH A/C ESS ALTERNATE STAT MSG. AFTER 5 MINS RECEIVED A/C ESS BUS CAUTION AGAIN WITH CB PNL 2 CB C2 POPPED. REMOVED AND REPLACED UTIL BUS CONTACTOR 1 IAW AMM 24-51-23 AND AWAC SUPP 09-023 OPS CHECK GOOD.