What was found
AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT BATTERY AFT. REMOVED AND REPLACED BATTERY AT EMERGENCY POWER SUPPLY UNIT 13WL PER AMM TASK 33-51-38-000-002/400-002.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED: EMERGENCY POWER SUPPLY UNIT BATTERY AFT. REMOVED AND REPLACED BATTERY AT EMERGENCY POWER SUPPLY UNIT 13WL PER AMM TASK 33-51-38-000-002/400-002.