PC is riding a beast. PC wants to make the beast attack.
Do they roll piloting or survival... and THEN roll brawl check for the beast? or only the piloting/survival roll (one roll)?
How does one attack with a mounted beast?
Stay on Target, page 82:
"A rider may employ
Perform A Combat Check with Vehicle Weapons
, using the natural weaponry of the mount he is riding by performing a
Survival check
"
You handle it the same way you would with a vehicle weapon, but roll Survival instead of Gunnery.
Optionally, use Move to fling the beast at your target.