As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
L4 DOOR M33407 BATTERY PACK FOUND INOP. L4 DOOR M33407 BATTERY PACK FOUND INOP. REPLACED BATTERY AND TEST NORMAL. REPLACED L4 DOOR EMERGENCY LIGHT POWER SUPPLY M33407 BATTERY PACK AND PERFORMED NEW BATTERY INSTALLATION TEST, THE TEST RESULT FOUND NORMAL AS PER AMM 33-51-06-960-802 REV 106.