As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MAINTENANCE INSPECTION, FOUND THE FOUND BATTERY PACKS DISCHARGED. SOME EMERGENCY LIGHTS WOULD NOT EXTINGUISH. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED BATTERY PACKS IAW AMM 33-50-04. OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.