How to get inside the IAA office room. This can be done on GTA Online as well.
1. Spawn/Call in a buzzard
2. Go to the building called Jonny Tung and fly up into it and go down where i did
3. now go to the IAA building and make SURE to not fly downward too much or you will respawn (unless you have a friend with you which will prevent the respawn)
4. Find the Office and land your helicopter in it and get out! (i would try to kill the back blade so you have less chances of being killed by the heli)
Also try to land in that next room. best spot to land your helicopter!
It might be glitchy at first but it will stay rendered once it loads up.
Like this thread if you find this helpful and be sure to thank me too!
trying to get other youtubers to see this so we can spread it