If my ETS falls on a Sunday, and I do to take terminal leave, will I be out on that Friday before my ETS?

Your ETS is Sunday, you're out of the Army Monday. Transition leave doesn't mean you're out of the Army, it just means you've left the area. Many Soldiers have been pulled back in for court martials while on transition leave, or had commanders revoke leave for various reasons. You aren't out of the Army until the day after you ETS.

It shouldn't. You may do your "final out" paperwork on Friday, but you would ld still be in the Army.

So, you would report to BN Staff Duty on Sunday, sign out (just like leave), and turn in your ID card and (if applicable) barracks key.

And you would still be eligible for duty, cleaning rosters, etc. On Friday and Saturday. Not that anyone except a supreme dick would do that. But they *could*, technically.