does the NG have a flap lock out feature if you overspeed the flap by a certain amount? I have never heard about this. You overspeed the flap, it allows you to retract to up, then shuts down?
No!
The NG does how ever have "Flap Load Relief" , retracting the flaps from 40->30 at trigger speed of 176 kias, and 30->25 at 163 (800-900)