My guess is he’ll only get convicted on the preventing operation charge.
Would’ve been better to just not notice he was there and take off.
I was thinking just make like you don't notice him, climb aboard and say "Takeoff in 5 minutes". Flip some switches that would generate a hum, indicating a warm-up, but no rotation, Have a camera/cell phone ready and film him panicking. Upload to YouTube and have the world watch as he soiled himself in panic. The guy would never be able to show his face again.
Something along the line of these wannabe Rambos at :25.
Hint: When you're protesting at a slaughterhouse, don't lock yourself to a conveyor belt.