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Northwest B-747 Hit By Lightning  
User currently offlineSIBILLE From Belgium, joined Jun 2005, 483 posts, RR: 2
Posted (7 years 4 months 2 weeks 3 days 21 hours ago) and read 9155 times:

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.

15 replies: All unread, jump to last
 
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 1, posted (7 years 4 months 2 weeks 3 days 21 hours ago) and read 9066 times:

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.


User currently offlinePaladin87 From United States of America, joined Jun 2007, 122 posts, RR: 0
Reply 2, posted (7 years 4 months 2 weeks 3 days 20 hours ago) and read 8920 times:

Didn't NWA discontinue that flight years ago Maybe it was the TPE-KIX flight

User currently offlineDon81603 From Canada, joined Jul 2005, 1185 posts, RR: 0
Reply 3, posted (7 years 4 months 2 weeks 3 days 16 hours ago) and read 8615 times:

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.
User currently offlineJRadier From Netherlands, joined Sep 2004, 4725 posts, RR: 50
Reply 4, posted (7 years 4 months 2 weeks 3 days 16 hours ago) and read 8554 times:

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
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 5, posted (7 years 4 months 2 weeks 3 days 16 hours ago) and read 8435 times:

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.


User currently offlineC680 From United States of America, joined Apr 2005, 588 posts, RR: 0
Reply 6, posted (7 years 4 months 2 weeks 3 days 5 hours ago) and read 7631 times:

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?
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 7, posted (7 years 4 months 2 weeks 3 days 5 hours ago) and read 7040 times:

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



Think of the brighter side!
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 8, posted (7 years 4 months 2 weeks 2 days 23 hours ago) and read 4078 times:

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.


User currently offlineMaverick623 From United States of America, joined Nov 2006, 5753 posts, RR: 6
Reply 9, posted (7 years 4 months 2 weeks 2 days 22 hours ago) and read 3733 times:

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
User currently offlineEI321 From Iraq, joined Jul 2009, 0 posts, RR: 0
Reply 10, posted (7 years 4 months 2 weeks 2 days 21 hours ago) and read 3375 times:

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.

User currently offlineWILCO737 From Greenland, joined Jun 2004, 9119 posts, RR: 76
Reply 11, posted (7 years 4 months 2 weeks 2 days 20 hours ago) and read 3313 times:
AIRLINERS.NET CREW
HEAD MODERATOR

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)
 airplane 



It it's not Boeing, I am not going.
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 12, posted (7 years 4 months 2 weeks 2 days 20 hours ago) and read 3245 times:

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



Think of the brighter side!
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 13, posted (7 years 4 months 2 weeks 2 days 18 hours ago) and read 3154 times:

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.


User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 14, posted (7 years 4 months 2 weeks 2 days 14 hours ago) and read 2994 times:

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

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



Think of the brighter side!
User currently offlineTdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 80
Reply 15, posted (7 years 4 months 2 weeks 2 days 2 hours ago) and read 2727 times:

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.


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