A movement of a few centimetres at the wingtip is nothing to worry about.
Aircraft in flight may show various oscillating motions. See
http://en.wikipedia.org/wiki/Aircraft_dynamic_modes.

During landing, crosswind gusts may sometimes require significant corrective
input from the pilot. In some rare cases even a go-around is necessary if
the wind blows hard.

If there would be some technical problem, the pilots have a large set of
checklists, diagnostic procedures and automatic diagnostic systems available
which can pinpoint the problem and give instructions how to continue the
flight.


"megaMAX" wrote
Hello everybody,
I want to tell you what's happened during a Finnair flight from
Helsinki to Milan, I'm not an expert of flight.

During the entire flight, I noticed that the aircraft was continuosly
rolling to right, and the pilot was correcting every 10-20 seconds the
attitude. I noticed this, because I was looking to the right wing and
the wing was continuosly going down of few centimeters, and after few
seconds there was a slight correction.

During landing, the aircraft was definitively rolling clockwise, in
fact when we touched the ground, it was really yawing and sliding, and
the pilot had to take a decise correction in order to align the
aircraft to the track.

I'm really not an expert, but I was wondering:

- what could have been the problem? The right engine?
- the pilot behaved correctly, completing the flight until destination
and trying this landing? An intermediate step could have been better?
- we have been in some danger, during the flight or at the moment of
landing?
- this episodes are made pubblic in some register, or the companies
try to hide them as much as possible?

Thanks!
Max