What was found
UPON PARKING AT GATE USING EXT POWER, EXT POWER FAULTS OUT WHILE EMERGENCY POWER DOES NOT TAKE OVER IN A BATT FAILED MODE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UPON PARKING AT GATE USING EXT POWER, EXT POWER FAULTS OUT WHILE EMERGENCY POWER DOES NOT TAKE OVER IN A BATT FAILED MODE.