As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY EYE LIGHT OVER SEAT 7 AS WELL AS THE RIGHT OVER WING EXIT LIGHTS ARE NOT ILLUMINATING WHEN BOTH BATT SWITCHES ARE OFF. INSPECTED BATTERY PACK #3 (UF903) AND FOUND EXCESSIVE HEAT EMANATING FROM CASE AN HOUR AFTER FLIGHT LANDED. REMOVED AND REPLACED BATTERY PACK NR 3 IAW AMM 33-50-06 OPS CHECK GOOD NO OTHER DEFECTS NOTED.