What a Lightning Strike looks like

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TTJJ
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What a Lightning Strike looks like

Post by TTJJ »

In the "All information is Good information" category we have this, which I am considering a training post.

On approach to Teterboro NJ, USA (KTEB) in a Dassault Falcon 7X at about 12,000 ft, in cloud with light rain but no CB's on the radar, we were struck by lightening. There was a big flash and a loud boom. We did not lose any radios, systems or controles. Controles are a big deal on this aircraft because it is fly by wire. There are no cables.

As our base is in Brazil, after landing our Maint. Manager asked me to look around the aircraft to see if we had really been hit. I reported that the hit was on the left side of the aircraft, given the flash I saw.

It then occurred to me that after 32 years in and 4 lightning strikes later, I had no idea what to look for. After combing the left side for about 15 minutes, finding nothing and breathing a huge sigh of releif I went to the right side, convinced that we had dodged the bullet. Duhhh, the two "exit wounds" on the right aileron were easy to see. I never did notice the two "entrance wounds" on the right outboard slat. The slat and aileron are toast.

Lesson learned: You really have to give the aircraft a solid going over...everywhere. (Which the factory reps did later that night)

No damage to any system was found.

The round black thing in the picture of the slats is a pen to give scale in the picture.

It seems we got hit twice, which sort of shoots that "lightning doesn't hit twice" theory all to hell.

I realize that each strike is different, but because I had never been shown what to look for I thought that these pictures might make you more aware of what this may look like should it happen to you.

All pictures are of the right aileron and right outboard slat.


Image

Image

Image

Image

edited because I posted the pictures twice and wording
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Last edited by TTJJ on Mon Apr 18, 2011 7:18 pm, edited 1 time in total.
ScurvyDog
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Re: What a Lightning Strike looks like

Post by ScurvyDog »

I got hit years ago in a C560, leaving out of KFLL. The exit marks look very familiar and resemble almost exactually what we got. We were lucky enough to not have entry marks. Besides a very quick flicker of the lights on board we didn't experience any other damage other than the replacement of one aileron. Not a cheap repair! I couldn't imagine the cost on a falcon!

Cool shots, thx for posting.
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bizjets101
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Re: What a Lightning Strike looks like

Post by bizjets101 »

Heh TJ thanx for the informative post - happy to hear there was no damage beyond what we see. What was the fix - anything replaced or buffed out??? At least you were at Falcon Jet TEB!!

Read your post regarding your pay scale - excellent post by the way!!!

Curious about your 7X - is your flight department flying two 7X's and if so do you fly them both or just your own aircraft? I've seen your boss on Forbes list - so it must be very interesting traveling the world in a 7X and avoiding all our Canadian winters!!!
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KK7
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Re: What a Lightning Strike looks like

Post by KK7 »

Thanks for the informative post! It's a somewhat rare event, but it does happen enough that it is something we should all be aware of. Thankfully the damage was minimal with respect to the effects in the air.
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fish4life
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Re: What a Lightning Strike looks like

Post by fish4life »

I remember one crew take a plane up get hit go back down and land, then take a diff one up and get hit again. Seems like a few planes each summer get hit where I work
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TTJJ
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Re: What a Lightning Strike looks like

Post by TTJJ »

Hi

Follow up:

The right aileron and outboard slat were toast and replaced. It took only 4.5 days and US$ 300K to get it flying again. It seems insurance doesn't cover lightning. Hmmm, I am glad the plane isn't mine...
They might be able to fix those parts and put them back on the plane, in which case the difference in values would be credited to the aircraft's account for future use. We will see.

Both HF radios have died because of the strike, which is a show stopper for an intercontinental aircraft. The aircraft is in Saint Loius for repairs and updates.

We have two 7Xs and a G-550, all private. I fly both 7Xs.

We do get around. My great frustration is not having flown Up North nor floats in Canada...sort of a "rite of passage" thing. If you do that, I envy you.

Right now I am in New Caledonia with one 7X for a week and another pilot is in St. Louis with the hurt birdie. It looks like I will be springing for some beer for him. He is not a happy camper stuck there...
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JA
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Re: What a Lightning Strike looks like

Post by JA »

Thanks for the informative post! Posts like this are why avcanada is such a great site. The pen was a great idea!
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2R
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Re: What a Lightning Strike looks like

Post by 2R »

Some insurance policies can cover lightening strikes.
If CB's are in the forecast they will not pay,only if unforecast weather is encountered.Or if you fire the pilots and make a breach of warranty claim.Firing the pilots and making a claim under the breach of warranty claim is only used as a last resort although i do suspect it is the reason why the pilots are usually blamed for not being perfect in an imperfect world.
But hey: that is why you get the big bucks :wink: :wink:
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Re: What a Lightning Strike looks like

Post by Hawkerflyer »

Does your 7X have the lightning detection unit installed?
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TTJJ
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Re: What a Lightning Strike looks like

Post by TTJJ »

Hi

Yes it does have the lightning detection system installed. Although it is not perfect, there was nothing close to the aircraft on it when we got hit so we should have been ok. I guess it was just another one of those "aw crap, NOW you tell me birth control is not 100% effective" moments in life.

I was wrong about the insurance. They are going to pay part of the costs.
A maintenance program we pay into doesn't cover lightning strikes, floods, volcanic eruptions, tsunamis nor, (although not specifically listed) they seem to imply - meteorite damage.

It also doesn't cover (rather un-sportingly if you ask me) damage from locust swarms.

I kid you not.
TTJJ
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KK7
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Re: What a Lightning Strike looks like

Post by KK7 »

Locust swarms are no joke!!!

I've flown into some locusts before in N. Africa, and although there was no apparent damage, the sound from the impact seems to imply that if it was any larger, it might start putting some dents in the metal. I've seen some pretty massive locusts, and although I haven't flown in a locust plague or swarm, I can't imagine you'd get a happy conclusion.
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