As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DISCRPANCY:PILOT NOTIFIED MAINTENANCE AND OPERATIONS IN FLIGHT THE #1 & # 2 FLIGHT GUIDANCE COMPUTER IS INTERMITTENT, AND THE PITCH TRIM DISENGAGED. CORRECTIVE ACTION:GULFSTREAM MAINTENANCE FOUND A PITCH TRIM SERVO DRUM AT FAULT. THE PITCH TRIM SERVO DRUM AND CABLES WERE REPLACED, AND OPERATIONAL CHECKS WERE COMPLETED. THE DEFERRED