As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING PRE FLIGHT FOUND NUMEROUS EMERGENCY LIGHTS OUT. TRIED CHARGING BATTERY PACK TWICE FOR THIRTY MINUTES EACH TIME WITH NO SUCCESS. NR 2 BATTERY PACK ON THE EMERGENCY LIGHTNING SYSTEM IS NOT HOLDING A CHARGE. EXTERIOR EMERGENCY LIGHTS ARE CONSIDERED INOPERATIVE. REMOVED EXISTING NR 4 BATTERY AND INSTALLED REPAIRED BATTERY IN SAME LOCATION. FUNCTIONAL CHECK OF EMERGENCY LIGHTS GOOD.