As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. ACCOMPLISHING WAKE UP CHECK LIST FOUND PASSENGER ENTRY DOOR 2R EMERGENCY POWER ASSIST SYSTEM PACK GREEN LIGHT OFF. PERFORMED EMERGENCY POWER ASSIST SYSTEM 9 VOLT BACK UP BATTERY REPLACEMENT ON PASSENGER ENTRY DOOR 2R, PER AMM 52-11-20.