As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)ON ENGAGING AUTO PILOT AFTER TAKEOFF, RED WARNING LIGHT AND "GEAR NOT DOWN" MESSAGE WITH A QUICK PITCH UP AND DOWN OF AIRCRAFT. AIRCRAFT RETURNED TO BASE. MAINTENANCE ACCOMPLISHED C.F.D.S. TEST OF A.F .S. AND DETERMINED F.A.C. #2 WAS AT FAULT. REPLACED F.A.C. AND GROUND TEST CARRIED OUT.