As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOOR 4 RIGHT AFT EMERGENCY POWER SUPPLY UNIT (M33409) FAILED OPE RATIONAL TEST. REQUIRED TO REPLACE BATTERY PACK. DOOR 4 RIGHT AFT EMERGENCY POWER SUPPLY BATTERY PACK REPLACEMENT CARRIED OUT AS PER AMM33-51-06 REV 100 DATED 05 JAN 2024.INSTALLATION TEST CARRIED OUT AND FOUND WORKING SATISFACTORY.