As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
R4 DOOR AFT EMERGENCY LIGHT POWER SUPPLY M33409 BATTERY PACK FOUND MALFUNCTIONED. REPLACED R4 DOOR AFT EMERGENCY LIGHT PO WER SUPPLY M33409 BATTERY PACK AND PERFORMED NEW BATTERY PACK TE ST THE TEST RESULT NORMAL AS PER AMM 33-51-06-960-802 REV.104.