As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUE TO REPEAT FAULTS WITH FWD CABIN EMERGENCY LIGHTING; INSPECT WIRING TO BATTERY PACKS M1675; M1676; M2816; AND M2335 AND REPAIR ANY DEFECTS FOUND. IF NO DEFECTS FOUND; REPLACE BATTERY PACK M2335 AS A PRECAUTION / REMOVED AND REPLACED BATTERY PACK M2335. NO DEFECTS NOTED. REF AMM 33-51-06.