Spurious operation of spoilers?
 

As a bored pax gazing out over the wing (B737), I have noticed the speed brakes making occasional minor deployments at what seems like the wrong time e.g. just after rotation. The panel lifts no more than a few centimeters and retracts again in less than a second - I assume the flight crew are not doing this, especially a few seconds after lift off. Is it some very smart function in the aircrafts automation? Is it supposed to occur?

NO, you should call a newspaper and report this !







Actually it's ok, it's just the low speed roll with the help of the spoilers ;)

I think he's trying to tell you that spoilers also assist in roll control,..like the ailerons,...if they 'runaway' they can be disarmed/deactivated

Crosswinds????

PA

As mentioned, the spoilers assist with roll control and you should also see the ailerons move in the same direction in synch. It's normal.

Regards,
BH.

Thanks for the info, folks

and it looks like this:
http://www.b737.org.uk/images/diff_spoilers.jpg