EMB ERJ 145 ER/LR
Confusion; Situational Awareness; Workload
Aircraft Equipment Problem Less Severe
Flight Crew Landed As Precaution; Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport; General Maintenance Action
Aircraft
First officer was flying when the wing rolled right about three times. The autopilot was kicked off and the controls were transferred to the Captain. The Captain hand flew into ZZZ while the first officer helped with radios and check list. No [checklist] items were done because it was a random hard over and the nose seemed to YAW in the other direction. The crew was thinking that it was a possible spoiler non commanded deployment. The plane was landed safely and the gate was made. The plane was [written] up and taken to the hangar from maintenance. There were no EICAS messages associated with the event; but there were huge vibrations and at least three hard rolls to the right with the autopilot on.First officer not understanding if it was just his side or not gave the Captain the controls and allowed him to fly the approach. The crew also verified twice approach clearance. Autopilot was turned off and not reused which trapped the hard roll over sensation.
The crew experienced three hard rolls to the right and vibrations. They disconnected the autopilot and returned to the departure airport.