I have another A319 question.
I was recently a passenger on an A319 and I noticed during the cruise that the plane was gently oscilating in the roll axis. One complete oscilation took about 3 seconds and the amplitude was a few degrees - hardly noticable unless you watched the wing against the horizon. I then checked the ailerons and you could see them working.
Is this a common thing to happen or was it caused by odd winds ?
Cheers