As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AIRCRAFT PITCHED UP AND DOWN EXCESSIVELY AT CRUISE ALTITUDE WITH AUTOPILOT ENGAGED, AUTOPILOT ONE AND TWO. PITCHED OSCILLATION BETWEEN 40 - 100 FPM. **SUPPLEMENTAL REPORT FOR AALA202209022146: MAINTENANCE REPLACED SOLENOID VALVE ON LEFT HAND GREEN ELEVATOR SERVO CONTROL ACTUATOR PER AMM 27-34-51. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED. ** (CLOSED)