As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND EMERGENCY LIGHT BATTERY PACK LOW CAPACITY AT R4 DOOR GALLE Y AREA. WIRING CHECK FOUND M33409 BATTERY PACK LOW CAPACITY REFPLACED M33409 BATTERY PACK AND NEW BATTERY PACK INSTALLATION TEST FOUND NORMAL AS PER WDM 33-51-66 REV.90 AMM 33 -51-06-960-802 REV.101.