Damaged Flying creatures?

[iwatt]

I don't have my books with me, but I seem to recall that creatures can't fly if they've taken more than 50% damage to their total hitpoints.

1) Were exactly is this rule?

2) What effect does subdual damage have?

 

[Someone]

That´s an old 2E rule. It´s no longer in effect.

 

[iwatt]

Ah thanks.