As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STANDBY POWER REPORTED INOPERATIVE. NO POWER OUTPUT TO BUS FROM ALTERNATOR. FOUND DEFECTIVE STANDBY POWER RELAY. THE RELAY SOLENOID SHAFT HAD DISCONNECTED FROM THE CONTACTOR BAR. SUBMITTER STATED THIS IS THE 4TH OCCURRENCE ON DIFFERENT SERIAL NUMBERED AIRCRAFT.