As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EMERGENCY PWR TEST FAIL REMOVED & REPLACED BOTH MAIN BATTERIES PER AMM 24-34-02 - BATTERY OPS CHECK NORMAL. PERFORMED TEST OF EMERGENCY POWER SYSTEM, TEST INITIALLY PASSED AND THEN BEGAN CONTINUOUSLY RUNNING THE EMERGENCY POWER TEST WITHOUT BEING PROMPTED BY ANY INPUTS. FURTHER T/S REQUIRED. C/W TECH ALERT FOR EMERGENCY POWER TEST. REF T3F18E004CUST. OPS CHECKS GOOD PER MM 24-24-00.