As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NR 2 SPU AUX PWR CAUTION LIGHT ILLUMINATED ON T/O. T/O ABORTED. TROUBLESHOOTING CARRIED OUT - VERIFIED SPU AC POWER CONTROLLER U/S- CAUSED NR 2 SPU AUX PWR CAUTION LIGHT TO REMAIN ILLUMINATED & WOULD NOT REVERT TO ALTERNATE POWER SUPPLY. REPLACED & TESTED SERVICEABLE IAW AMM CH 24-50-02-04.