As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AC ESSENTIAL BUSS CAUTION MESSAGE. THE AC ESSENTIAL BUSS WOULD NOT ACCEPT POWER FROM EITHER AC BUSS 1 OR AC BUSS 2. T/S IAW FIM 24-20-00. FOUND RELAY K1XD BAD. REMOVED AND REPLACED RELAY K1XD. PN V210D090BC, IAW MM. OPS CHECK GOOD IAW MM.