As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ACFT FOUND ON GROUND RUN TO BE NOT CHARGING. SNAG TROUBLESHOT TO FIND PROBLEM TO BE ALTERNATOR CONTROL UNIT PN AC2101. NO VOLTAGE FOUND TO BE SUPPLIED TO ALTERNATOR FIELD WIRE. ALTERNATOR CONTROL UNIT REPLACE NEW. GROUND RUN COMPLETED ALL PARAMETERS CHECKED SERVICEABLE.