What was found
DURING INSPECTION THE LT AFT EMERGENCY POWER SUPPLY UNIT FAILED TEST. MAINTENANCE REMOVED AND REPLACED THE LT AFT EMERGENCY POWER SUPPLY UNIT (13WL) AND BATTERY PACK, OPERATIONAL CHECK WAS GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING INSPECTION THE LT AFT EMERGENCY POWER SUPPLY UNIT FAILED TEST. MAINTENANCE REMOVED AND REPLACED THE LT AFT EMERGENCY POWER SUPPLY UNIT (13WL) AND BATTERY PACK, OPERATIONAL CHECK WAS GOOD.