Parachute

I'm using TGE and want to add have an AI model with parachute deployment animation that I want to spawn from a flying aircraft. Are there any such scripting rtesources or tutorials out there? I'm assuming I could either count the time after spawn before chute deployment or somehow calculate the distance from spawn point to ground before chute deployment. I'm thinking the second might be better as there will be several aircraft flying at different heights. I would really appreciate any help with this. I'm realy not a coder so please be as specific as possible. Thanks in advance :)