As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY UNIT FORWARD LEFT FAULT ON THE PROGRAMMING AND TEST PANEL 110RH. MAINTENANCE REPLACED EMERGENCY POWER SUPPLY UNIT AND BATTERY PER AMM 33-51-38 AND PERFORMED SATISFACTORY OPERATIONAL CHECK.