What was found
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY UNIT 3WL AFT LEFT FAULT. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY PER AMM ASK 33-51-00.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS NOT GROUNDED: EMERGENCY POWER SUPPLY UNIT 3WL AFT LEFT FAULT. REMOVED AND REPLACED EMERGENCY POWER SUPPLY UNIT BATTERY PER AMM ASK 33-51-00.