As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHT BATTERY FAULT EICAS MESSAGE APPEARED FOR 30 MINUTES, CLEARED, AND REAPPEARED AGAIN INTERMITTENTLY. THE MESSAGE APPEARS RANDOMLY WITH THE EMERGENCY LIGHT SWITCH IN THE ARMED POSITION. R & R EMERGENCY BATTERY NR 2 IAW AMM 33-50-01.