Had asymmetric flap on one occasion, flap problems on many others including failure to retract from a full flap position.
The asymmetric flap occured during stall recovery in a C150 (40 degr. flap)
Nose down full power one flap came up.
Didn't take me too long still had my finger on the flap lever, put the other one down again and flew home with full flap extended at appr. 55 mph.
Did roll pretty quick, no idea if full aileron would have stopped it, didn't feel like trying it that time.
Turned out the cable from the flap motor broke.
Also had a window blow out, but I'll save that story for another time...
