As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE AIR DRIVEN GENERATOR DEPLOYED UNCOMMANDED. COMPLIED WITH QRH, GENERATORS DID NOT PICK UP THE LOAD, AND POWER TRANSFER OVERRIDE SWITCH DID NOT WORK. DIVERTED. THE GENERATOR TRANSFER OCCURRED BELOW 80 KNOTS AFTER LANDING. REPLACED ADG AUTO DEPLOY CONTROL PANEL UNIT. CHECKED GOOD. REPLACED CONTROL PANEL CONNECTOR.