As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INADVERTENT GROUND POWER LOSS, FOUND VARIOUS MID AND AFT CABIN EMERGENCY LIGHTS FAILED TO ILLUMINATE. MAINTENANCE REPLACED THE BATTERIES IN 12WL AND 13WL IAW AMM 33-51-38-40-002-A. A SATISFACTORY OPS CHECK WAS ACCOMPLISHED IAW AMM 33-51-00.