What was found
AIRCRAFT NOT GROUNDED - EPSU (EMERGENCY POWER SUPPLY UNIT) TEST FAILED, BATTERY PACK 10WL. REMOVED AND REPLACED EPSU 10WL PER AMM 33-51-38, OPERATIONAL CHECK GOOD, EPSU TEST PASSED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
AIRCRAFT NOT GROUNDED - EPSU (EMERGENCY POWER SUPPLY UNIT) TEST FAILED, BATTERY PACK 10WL. REMOVED AND REPLACED EPSU 10WL PER AMM 33-51-38, OPERATIONAL CHECK GOOD, EPSU TEST PASSED.