Originally Posted by
B737NG_Pilot
Why do we extended Flaps and then do the flight control check on the B737, before taxi?
Is it just to standardise the SOP or is there a technical reason behind it?
It could be something to do with time saving. Boeing say you can perform the flight controls check once the "Green Light" on the flaps has illuminated. If you perform the control checks first then select 1,5,15, or even 25 you could be there for another 1-2 minutes.