What was found
FLT 221 - BOS - EEL - MID LEFT EMERGENCY POWER SUPPLY UNIT BATTERY INOPERATIVE. MAINTENANCE REPLACED MID LEFT EPSU BATTERY IAW AIRBUS MAINTENANCE MANUAL 33-51-38-04-400-002.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FLT 221 - BOS - EEL - MID LEFT EMERGENCY POWER SUPPLY UNIT BATTERY INOPERATIVE. MAINTENANCE REPLACED MID LEFT EPSU BATTERY IAW AIRBUS MAINTENANCE MANUAL 33-51-38-04-400-002.