As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB AT FLIGHT LEVEL 210 AC CROSS DURING CLIMB AT FLIGHT LEVEL 210 AC CROSS TIE LOCK OUT LIGHT TURNED ON WITH NO ADDITIONAL LIGHTS IN THE EOAP. FLIGHT ATTENDANTS REPORTED STRONG ELECTRICAL ODOR. FOUND BURNT GCU APU IN ACCORDANCE TO AMM 24-20-07 PAG 401, GCU APU AND RT ENGINE GCU WERE REPLACED. TEST ON GROUND SATISFACTORY. THE AC BUS CONTROL UNIT WAS REPLACED IAW AMM 24-20-08 PG 401, TEST ON GROUND SATISFACTORY.