What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) On departure from sjc, approximately 14,000 feet MSL with the autopilot engaged, the captain noticed the control column cycling forward and aft once every 20 seconds. "Perf" was disconnected, and the captain climbed using mach hold and epr limit. This had no effect, and the control column continued to cycle forward and aft once every 20-30 seconds. Upon reacing cruise altitude, FL 330, with the autopilot engaged, the control column continued to cycle forward and aft. The captain disconnected the autopilot, hand-flew the aircraft, and noticed the control column continued to cycle forward and aft. The captain had the first officer take the controls to see if he could feel and see what was occurring. The first officer experienced the same indications. The captain diverted to sfo and landed. Maintenance checked the aircraft and found no apparent discrepancies. Maintenance removed and replaced the left and right AOA sensors, inspected the horizontal-stabilizer jackscrew, and removed and replaced the elevator-load-feel spring and the aircraft mach-trim actuator. The aircraft was flown on a functional check flight, which was satisfactory, and returned to service.
As the FAA filed it
(-23) ON DEPARTURE FROM SJC, APPROXIMATELY 14,000 FEET MSL WITH THE AUTOPILOT ENGAGED, THE CAPTAIN NOTICED THE CONTROL COLUMN CYCLING FORWARD AND AFT ONCE EVERY 20 SECONDS. "PERF" WAS DISCONNECTED, AND THE CAPTAIN CLIMBED USING MACH HOLD AND EPR LIMIT. THIS HAD NO EFFECT, AND THE CONTROL COLUMN CONTINUED TO CYCLE FORWARD AND AFT ONCE EVERY 20-30 SECONDS. UPON REACING CRUISE ALTITUDE, FL 330, WITH THE AUTOPILOT ENGAGED, THE CONTROL COLUMN CONTINUED TO CYCLE FORWARD AND AFT. THE CAPTAIN DISCONNECTED THE AUTOPILOT, HAND-FLEW THE AIRCRAFT, AND NOTICED THE CONTROL COLUMN CONTINUED TO CYCLE FORWARD AND AFT. THE CAPTAIN HAD THE FIRST OFFICER TAKE THE CONTROLS TO SEE IF HE COULD FEEL AND SEE WHAT WAS OCCURRING. THE FIRST OFFICER EXPERIENCED THE SAME INDICATIONS. THE CAPTAIN DIVERTED TO SFO AND LANDED. MAINTENANCE CHECKED THE AIRCRAFT AND FOUND NO APPARENT DISCREPANCIES. MAINTENANCE REMOVED AND REPLACED THE LEFT AND RIGHT AOA SENSORS, INSPECTED THE HORIZONTAL-STABILIZER JACKSCREW, AND REMOVED AND REPLACED THE ELEVATOR-LOAD-FEEL SPRING AND THE AIRCRAFT MACH-TRIM ACTUATOR. THE AIRCRAFT WAS FLOWN ON A FUNCTIONAL CHECK FLIGHT, WHICH WAS SATISFACTORY, AND RETURNED TO SERVICE.
Other reports on N595AA · 2
Matched to the same aircraft by N-number and date.