Animation, read arg from exisiting aircraft

[grim_reaper68]

Hi, is there a way to use an argument from a aircraft to animate a part of your own creation? I've made corail pods for the F1, and I'm trying to have the safety trap animated. The F1 has the chockes animated with the arg 844, so I would have the trap opening when the wheel chockes are visible. I set my animation with the rotation arg 844. But nothing happens. As my knowledge in coding is very poor, if someone can give me an example. Or must it be coded in the F1 dll file to work?

[tripod3]

Certain arg could be applied only for one model locally.