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sibille
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Northwest B-747 Hit By Lightning

Tue Aug 14, 2007 6:43 pm

According to Yahoo, a Northwest B-747 flying from Taipei to Tokyo was hit by lightning and had to come back for an emergency landing at Taipei. No information avaible yet about damages and actual aircraft position.
 
tdscanuck
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RE: Northwest B-747 Hit By Lightning

Tue Aug 14, 2007 7:11 pm

Quoting SIBILLE (Thread starter):
Northwest B-747 flying from Taipei to Tokyo wasrnhit by lightning and had to come back for an emergency landing atrnTaipei.

Must have been a heck of a strike...usually they just keep going and do a lightning inspection when they arrive.

Tom.
 
paladin87
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RE: Northwest B-747 Hit By Lightning

Tue Aug 14, 2007 8:02 pm

Didn't NWA discontinue that flight years ago Maybe it was the TPE-KIX flight
 
don81603
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RE: Northwest B-747 Hit By Lightning

Tue Aug 14, 2007 11:35 pm

It's pretty clear that the designers and manufacturers would build in resistance from lightning strikes. But could it be possible for a strike in the nose to disrupt electronics and the avionics (the proverbial 1 in a million strike) to the point that the return was nessesitated by damage caused by the strike?
Eagles may soar, but weasels don't get sucked into jet engines.
 
JRadier
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RE: Northwest B-747 Hit By Lightning

Tue Aug 14, 2007 11:47 pm

Quoting Tdscanuck (Reply 1):
Must have been a heck of a strike...usually they just keep going and do a lightning inspection when they arrive.

Just what I was thinking. I had a lightning strike last week on LH KBP-MUC, but there was no problem whatsoever. Strike was on the wingtipfence tho, pretty close to the dischargers.
For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and ther
 
tdscanuck
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 12:08 am

Quoting Don81603 (Reply 3):
But could it be possible for a strike in the nose to disrupt electronics and the avionics (the proverbial 1 in a million strike) to the point that the return was nessesitated by damage caused by the strike?

Anything's possible...the radome usually has great big diverter strips to protect against this. Based on the fact that the flight crew turned back, I've got to assume that something went screwy. Any strike on primary structure would typically go through the structure. All of the avionics are supposed to be able to take the transients that result from lightning current going through their ground path (the structure).

Quoting JRadier (Reply 4):
Strike was on the wingtipfence tho, pretty close to the dischargers.

The dischargers, at least on the Boeing's I'm familiar with, are mounted on the lightning diverter strip so that's pretty normal. The dischargers themselves don't offer any lightning protection, they're just there to disipate precipitation static.

Tom.
 
c680
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 10:42 am

It was a NW Cargo flight that had a navigation equipment failure shortly after takeoff.

Taiwan Radio claimed a lightning strike, but that is unconfirmed.

Full story at:

http://www.news24.com/News24/World/News/0,,2-10-1462_2164457,00.html
My happy place is FL470 - what's yours?
 
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HAWK21M
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 11:18 am

Quoting Tdscanuck (Reply 5):
The dischargers themselves don't offer any lightning protection, they're just there to disipate precipitation static

 checkmark 
Probably some Avionics malfunction as a result of the strike that prompted a diversion.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
tdscanuck
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 5:11 pm

Quoting HAWK21M (Reply 7):
Probably some Avionics malfunction as a result of the strike that prompted a diversion.

They must have bad karma...where I work now, we get about one lightning strike per week and we haven't fried any avionics yet.

Tom.
 
Maverick623
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 6:05 pm

Quoting Tdscanuck (Reply 1):
Must have been a heck of a strike...usually they just keep going and do a lightning inspection when they arrive.

Exactly what I was going to say. I constantly shock people when I mention that I hear of at least one strike per week... and that's just what I directly hear during 40 measly hours of working on the ramp at PHX.

Maybe it's a good thing people don't realize it... bet a lot of them wouldn't fly again (or maybe just not as often lol)
"PHX is Phoenix, PDX is the other city" -777Way
 
EI321
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 7:00 pm

As was said above, lightening strikes on planes are very common and usually harmless, so It must have been a serious one if the plane turned back.
 
wilco737
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 7:38 pm

Maybe the crew in the cockpit got some weird indications... Maybe some of the avionics got too much current or voltage and quit... who knows...
But as said: usually a lightning strike isnt much of a big deal...

WILCO737 (MD11F)
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HAWK21M
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 8:19 pm

Quoting Tdscanuck (Reply 8):
They must have bad karma...where I work now, we get about one lightning strike per week and we haven't fried any avionics yet

What fleet.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
tdscanuck
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RE: Northwest B-747 Hit By Lightning

Wed Aug 15, 2007 9:53 pm

Quoting HAWK21M (Reply 12):
Quoting Tdscanuck (Reply 8):
They must have bad karma...where I work now, we get about one lightning strike per week and we haven't fried any avionics yet

What fleet.

737NG. We do replace a lot of winglets...

Tom.
 
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HAWK21M
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RE: Northwest B-747 Hit By Lightning

Thu Aug 16, 2007 2:08 am

Quoting Tdscanuck (Reply 13):
737NG. We do replace a lot of winglets...

Winglets replaced.Why.Or are you meaning static dischargers.
regds
MEL
I may not win often, but I damn well never lose!!! ;)
 
tdscanuck
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RE: Northwest B-747 Hit By Lightning

Thu Aug 16, 2007 2:28 pm

Quoting HAWK21M (Reply 14):
Quoting Tdscanuck (Reply 13):
737NG. We do replace a lot of winglets...

Winglets replaced.Why.Or are you meaning static dischargers.

No, I mean winglets (we replace static dischargers too). The winglets are frequent recipients of lightning strikes (all the pointy parts are). Due to flutter limitations, you're very limited on the repairs that you can do to a winglet and most of them are a whole lot easier to do off wing than on (it's mostly composite repair). So, if we get damage beyond allowable limits, we just replace the winglet with a fresh one and do the repair offline.

Tom.