As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT MX - LAX - WHILE PERFORMING SERVICE AND ROUTINE CHECKS, MX PERSONNEL FOUND OVERWING EMERGENCY LIGHTS OUT. MX PERSONNEL REMOVED AND REPLACED NR 4 EMERGENCY LIGHT BATTERY OPERATIONALLY CHECKED SATISFACTORY AND A/C WAS RELEASED TO RETURN FOR SERVICE IN AIRWORTHY CONDITIONS.