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Lightning strikes your plane. Sounds like a scene from a horror movie, right? Planes are struck by lightning more often than you might think. In this edited CNN.com interview with William Voss, the president and CEO of the Flight Safety Foundation, we learned more about what can happen in the event your plane is struck by lightning.
CNN: How big an issue are lightning strikes to planes?
William Voss: Airplanes have been designed for years to deal with lightning strikes pretty well. Since the 1930s, it's been clearly understood that aircraft will be subjected to lightning strikes, so they're sort of designed to take it.
And they do it by basically making sure there's a conductive path so that the lightning runs around the skin of the aircraft. It is dissipated out safely through points that have static wicks [antenna-like devices on wingtips] and so on, things that help the electricity flow around the aircraft and back out to the atmosphere.
You don't really see the fuel igniting or aircraft breaking apart, and most of the time you don't see any damage at all. It dissipates as designed. Sometimes the lightning bolt is substantial enough that it will actually maybe punch a little hole in the skin as it goes out, but that's about all that it really does.
CNN: Is it possible for lightning to cause a plane to crash these days?
Voss: Pretty unlikely. I can't say anything is impossible, but we certainly don't see that happening. It's pretty well down on our list of concerns, again because we have a lot of experience with this, and aircraft get hit by lightning every day.
CNN: If a bolt strikes a plane, what kind of damage could it do?
Voss: You normally see damage to the wing tips or the tail. It's usually a sharp, pointy part of the aircraft. Sometimes you see some damage to that, which is highly localized, and if it's as big as your fist, it would be amazing. But it's usually more in the line of maybe the size of a quarter—a hole punched in the aircraft.
CNN: What about the electronics?
Voss: The electronics could be susceptible, but they do develop electronics and test [them] assuming static discharge is an issue, because even without lightning, static buildup on an aircraft is significant, and so to a great extent the electronics have been hardened for it.
So you don't normally see much of an upset on the electronics.
CNN: How about the fuel tank?
Voss: Same thing. There's static discharge precautions, grounding precautions built into the fuel tanks.
CNN: So it seems like the testing is pretty rigorous for planes.
Voss: Oh, absolutely. Lightning is not an unexpected threat, so it's something that people have designed around pretty well over the last 50-60 years.
CNN: If you're on a plane and it's struck by lightning, what do you feel?
Voss: Probably nothing. You might notice the bright flash.
CNN: You wouldn't feel a jolt or something similar?
Voss: You probably wouldn't feel anything at all because it just gets routed around the outside the aircraft. Almost the same thing that happens to your car. If you're in your car and you get by lightning you might not even know it happened.
CNN: If pilots suspect a plane was hit by lightning, would it be grounded?
Voss: They would certainly inspect the aircraft in the event you had some sort of damage, where it could have exited some place and blown a little metal out. That's also the reason that pilots walk around the airplane still. It may seem old-fashioned, but mechanics and pilots do check the aircraft before every flight just in case something like that could have happened.
CNN: Landing and take off is always a critical time, so if lightning strikes then is that more dangerous than being hit mid-flight?
Voss: It could be distracting, but the far greater hazards on landing and departure are associated with the changes in wind direction and wind shear with thunderstorms. That's a far more hazardous circumstance.
CNN: So should the average passenger be even worried about a lightning strike on a plane?
Voss: Not really. Lightning is just not a real big issue. The things that surround lightning, like the turbulence, the wind shear and so on associated with thunderstorms are far greater hazards than the lightning, even though lightning is by its nature a bit frightening.
“Can lightning bring down a plane?” Pawlowski, A. CNN.com. August 2010. Accessed on 08/20/2010.
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