As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT LATERAL SERVO RECEIVED WITH A WHITE-UP OF "RIGHT LATERAL SECOND STAGE PILOT VALVE STUCK". CONFIRMED SECOND STAGE PILOT VALVE STUCK. DISASSEMBLED PILOT VALVE AND FOUND SCORING. HYDRAULIC OIL SAMPLE WILL BE SENT OUT TO DETERMINE WHAT CAUSED SCORING OF PILOT VALVE. OPERATOR NOTIFIED OF POSSIBLE CONTAMINATED SYSTEM.