Players flying the attack heli with a gun attached to the turret can now fire it from the pilot seat. Players must have a key/button bound to attack3. By default, this is the middle mouse button (scroll wheel). If you have bound the middle mouse button to another option, you can bind it back to attack3 by entering the following into your F1 console:
bind mouse2 +attack3
If you wish to bind it to another key, just replace mouse2 with the key you want. For example, to bind attack3 to the Z key, you would enter:
bind z +attack3
To bind to spacebar:
bind space +attack3