As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL EMERGENCY LIGHTS AFT OF STA 520 RIGHT/LEFT HAND ARE INOP NEED REPLACE BATTERY PACKS M1673 M1672. PERFORMED TROUBLESHOOTING ALL EMERGENCY LIGHTS AFT OF STA 520 RIGHT/LEFT HAND ARE INOP; FOUND BATTERY PACKS M1672; M1673, DO NOT WORK PROPERLY. REMOVED AND REPLACED BATTERY PACKS M1672; M1673 PER AMM 33-51-06-960-802; PERFORMED GOOD TEST.