As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: WHILE DOING THE PS CHECK AND CHECKING EMERGENCY LIGHTS, FOUND EMERGENCY LIGHTS OUT ROW 1 TO 4 LEFT HAND AND RIGHT HAND SIDE. REPLACED BATTERY PACK ABOVE 1R DOOR PER AMM 33-51-06 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK