Straight and level flight at constant airspeed. Extend flaps one notch. If the plane slows you have flap extension.
Stabilize at new configuration and speed. Extend flaps one notch. Check a/c slows.
Repeat again and again.
No unusual roll show symmetrical extension.
Slow to slightly lower than Vref at altitude to verify a/c handling. If normal handling continue but if it's not increase Vref/Vapp, plus buffer, above the speed that the abnormal handling occurred.
Last edited by misd-agin; 13th March 2013 at 15:01.
Reason: added last two sentences