As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO PLATFORM DUE TO DURING TAXING, THE ELEC LIGHT TURNED ON. PERFORMED ELEC SYS AUTO TEST IAW FIM 24-31 TASK 825, DETECTING THE RT AUXILIARY BATTERY CHARGER WITH FAILURE. THE RT AUXILIARY BATTERY CHARGER & AUXILIARY BATTERY WERE REPLACED IAW AMM 24-31-31 & AMM 24-31-11, TESTED CORRECT.