As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: MAINTENANCE FOUND EMERGENCY POWER SUPPLY UNIT 14WL BATTERY FAULT MESSAGE DURING ACCOMPLISHMENT OF TASK CARD 26L00005005. MAINTENANCE REPLACED BATTERY PER AMM 33-51-38 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.