Pro Tip: Get a New Bird

On the eighth campaign mission, New Alexandria, you can effectively request a new Falcon at any time.  If your plane has gotten shot up and is smoking, just set it down on any roof top or balcony and get out.  You will see a prompt that says "Call for emergency evac."  Hit down on your D-pad, and Kat will send up a brand new Falcon with two new gunners and you can continue right where you left off.