White Bird - S1-E19
Visible crew/equipment: After KITT cuts the plane in half, the camera looking on the left side of the plane is mounted to the wing's underside. A moment later, when KITT nears it, the camera is gone.

White Bird - S1-E19
Visible crew/equipment: As KITT goes to jump over the fence of the airport, the helmeted stunt driver is seen, as well as part of the ramp pops up into view. Also, you can plainly see that it's the lightweight stunt car, as you can see though it from the bottom.
Answer: KITT didn't choose to go off the cliff in Goliath Returns, it just happened as he tried to avoid Goliath. Just 'cus it happened, doesn't mean It's gonna cure his fear of "flying"