Help.. xD

Need some help with Rotation. i don't even if this is possible but

for example : i have a player that is one movie clip. inside that movie clip
i have 2 movie clips. one rotating arm. and one Body with / run cycle / jump / etc.

so i am wondering. if is it possible to change the action script in the "player" movie clip if the rotating arm reaches for example : 120 degrees?

like?

onClipEvent (enterFrame) {
if(_root.arm._rotation<0&&_root.arm._rotation<180) {
}
}

but i want to have the script on the player movie clip. not on the arm movie clip