As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
M/D 3L CENTER EMERGENCY POWER SUPPLY M33406 BATTERY PACK FOUND L OW CAPACITY. REPLACED M/D 3 REV 102 L CENTER EMERGENCY POWER SUPPLY M33406 BATTERY PACK AND C/O NEW BATTERY PACK INSTALLATION TEST & CAPACITY CHECK. THE TEST RESULT FOUND NORMAL AS PER AMM 33-51-06-960-802 & AMM 33-51-06-200-801