As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY LIGHTS AT SEAT ROW 9 CBA AND 11 CBA ARE INOP<[01] TROUBLESHOT TO BAD EMERGENCY LIGHTS BATTERY PACK M1670. REMOVED AND REPLACED M1670 BATTERY PACK AND PERFORMED SATISFACTORY OPERATIONAL TEST PER AMM 33-51-06-960-805.;[02] VERIFIED CORRECTIVE ACTION #1.