What was found
AIRCRAFT WAS GROUNDED. EMERGENCY POWER SUPPLY UNIT 13WL AFT LEFT FAILED TEST. REMOVED AND REPLACED EPSU BATTERY IAW AMM 33-51-38. OPERATIONAL CHECK GOOD.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT WAS GROUNDED. EMERGENCY POWER SUPPLY UNIT 13WL AFT LEFT FAILED TEST. REMOVED AND REPLACED EPSU BATTERY IAW AMM 33-51-38. OPERATIONAL CHECK GOOD.