As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START, ELECTRIC LIGHT WAS ILLUMINATED ON OVERHEAD PANEL. ACFT GROUNDED. ACCOMPLISHED FIM ELECTRICAL LIGHT BITE 24-31, TASK 801, AUX BATTERY CHARGER INOP I FAULT. VERIFIED AUX BATTERY CHARGER, C/B P91 WAS SET AND LIGHTS ON AUX BATTERY CHARGER WERE BOTH GREEN, CLEARED FAULT WITH NO FURTHER DISCREPANCIES. AUX BATTERY VOLTS WITHIN LIMITS AMM 24-31-11. NO HISTORY 30 DAYS. ALL GROUND TESTS PASS.