EMB ERJ 170/175 ER/LR
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Flight Crew Total 3600; Flight Crew Type 250
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft
During the RNAV visual approach to XXR Aircraft X had a jammed control wheel (aileron) specifically no left roll at approx 600 AGL shortly after disconnecting the autopilot; while rolling out of the turn to final. I was flying at the time of the malfunction. I brought it to the attention of [the] Captain; and we exchanged control to find that his left ailerons were also jammed. Captain quickly and verbally performed the memory item with confirmation and disconnected the aileron. We then determined that the right side controls had roll authority; while the Captain was helping on the elevator in case of any other issues. Together we continued a stable approach to landing in the touchdown zone and on centerline. Maintenance at ZZZ found a flashlight left in the forward Electronics bay and speculated that to be the cause of the jam.
Working Aircraft X to ZZZ.It was the First Officer's leg to fly. It was an uneventful flight until the landing. We were given the RNAV XXR visual approach. We had the autopilot fly until we were on a left base leg. At that point the first officer disconnected the autopilot to hand fly and make the left base turn. He rolled out and had the plane in a stable approach when I called out 1000ft instruments normal. Roughly around 600ft the First Officer called out that the left aileron was jammed. I verified this as mine was also jammed. I then performed our immediate memory item and disconnected the aileron disconnect handle. My side was still jammed so the First Officer continued to fly and I was helping on the elevator to make sure we didn't have any other issues. I elected to continue since we were stable and I did not want to do a go around since the wind was reported on the ATIS of 190 at 9 gusting 17. We safely landed the aircraft and taxied to the gateWe deplaned through the jet bridge. No passengers knew about this incident. After deplaning I briefed the flight attendants on the incident and made all the appropriate phone calls to dispatch and the chief pilot. Contract mx came out to the aircraft later and found that a flashlight was down in the avionics bay which must have rolled around on final and caused the jam.
EMB-175 flight crew reported the left aileron was jammed on the Captain's side.