As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON ENGINE START UP, WHILE PERFORM PRE-TAXI CHECKS, CREW DISCOVERED THE "AC" FAIL LIGHT WAS ILLUMINATED ON THE ANNUNCIATOR PANEL AND WOULD NOT EXTINGUISH. MX PERFORMED TROUBLESHOTTING OF THE SYS AND FOUND THAT THE ANNUCIATOR PANEL WAS THE PROBLEM. THIS WAS THE FIRST FLIGHT WITH NEW ANNUCIATOR PANEL INSTALLED. ANNUCIATOR PANEL WAS R & R WITH REPAIRED ANNUCIATOR PANEL, PN 465-1-17, SN 647. ANNUCIATOR PANEL WAS REPAIRED ON W/O 1865177. OPS CHECKED SATISFACTORY.