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NWA 747 Breaks Main Gear  
User currently offlineHammer From United States of America, joined Jul 2001, 689 posts, RR: 2
Posted (9 years 5 months 4 days 20 hours ago) and read 13961 times:

This afternoon flight 25 A/C#6304, bound for Tokyo, broke the right (center) main gear. It was getting pushed back from the gate and as they were turning it during pushback, a support bar broke and the gear twisted and shreaded 2 tires....they had to off load the passenger, fuel..etc...to get the weight off of it so they could tow it back to the gate...it blocked gate 24 for about 2 hours, it is back at the gate and will be going to the hangar for repairs....

22 replies: All unread, jump to last
 
User currently offlineAS739X From United States of America, joined Apr 2003, 6195 posts, RR: 24
Reply 1, posted (9 years 5 months 4 days 20 hours ago) and read 13918 times:

Bound from NRT from? Not a lot of info for those without access to airline computers!

For those wondering/
Flight #25 DTW-NRT-PVG
Dept. Time scheduled.. 235p

ASSFO

[Edited 2005-07-21 02:39:37]


"Some pilots avoid storm cells and some play connect the dots!"
User currently offlineCentrair From Japan, joined Jan 2005, 3599 posts, RR: 20
Reply 2, posted (9 years 5 months 4 days 20 hours ago) and read 13898 times:

WOW. That is not good. That was at DTW right?
Must have been hell. Any pictures?



Yes...I am not a KIX fan. Let's Japanese Aviation!
User currently offlineAsstChiefMark From , joined Dec 1969, posts, RR:
Reply 3, posted (9 years 5 months 4 days 20 hours ago) and read 13891 times:

Did you throw the passengers onto a couple of spare 753's or DC-10's so they could get where they're going? Or were they stranded?

Mark


User currently offlineHammer From United States of America, joined Jul 2001, 689 posts, RR: 2
Reply 4, posted (9 years 5 months 4 days 20 hours ago) and read 13877 times:

to NRT and yes here in DTW

User currently offlineAsstChiefMark From , joined Dec 1969, posts, RR:
Reply 5, posted (9 years 5 months 4 days 20 hours ago) and read 13842 times:

Ooops... I see NWA25D is a 744 in the air.

Mark


User currently offlineHammer From United States of America, joined Jul 2001, 689 posts, RR: 2
Reply 6, posted (9 years 5 months 4 days 20 hours ago) and read 13819 times:

they were placed on another 747-400 A/C#6307 and are on there way...

User currently offlineTGV From France, joined Dec 2004, 874 posts, RR: 20
Reply 7, posted (9 years 5 months 4 days 17 hours ago) and read 13466 times:

Can we assume it is this kind of incident that leads to have this type of tests for new aircraft ?

A380 Main Landing Gear (by Liedetectors Jul 21 2005 in Civil Aviation)



Avoid 777 with 3-4-3 config in Y ! They are real sardine cans. (AF/KL for example)
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 8, posted (9 years 5 months 4 days 12 hours ago) and read 13017 times:

Probably a Sheared LG Pin weakened in a Prior "Unreported Heavy" landing.
Any Pics.
regds
MEL



Think of the brighter side!
User currently offlineVikingair From United States of America, joined Aug 2004, 100 posts, RR: 0
Reply 9, posted (9 years 5 months 4 days 7 hours ago) and read 11313 times:

Could be that the body gear steering locked up.

User currently offlineTheredbaron From Mexico, joined Mar 2005, 2329 posts, RR: 9
Reply 10, posted (9 years 5 months 4 days 5 hours ago) and read 9897 times:

At the risk of repeating myself I guess NWA must go to Louisiana, Catemaco (Mexico), Port au Prince (Haiti) to get those pesky jinxes and bad luck removed, they have more than enough land misshapps to garantee the work of a wizard, chamman or vodoo doctor..!


The best seat in a Plane is the Jumpseat.
User currently offlineKappel From Suriname, joined Jul 2005, 3533 posts, RR: 17
Reply 11, posted (9 years 5 months 4 days 4 hours ago) and read 8692 times:

Quoting HAWK21M (Reply 8):
Probably a Sheared LG Pin weakened in a Prior "Unreported Heavy" landing.
Any Pics.
regds
MEL

That must have been some heavy landing!!!! Does this kind of stuff happen often? It's the first time I've heard of a landing gear breaking off. (though, that's not saying much)



L1011,733,734,73G,738,743,744,752,763,772,77W,DC855,DC863,DC930,DC950,MD11,MD88,306,319,320,321,343,346,ARJ85,CR7,E195
User currently offlineBWI757 From Israel, joined Dec 2004, 429 posts, RR: 2
Reply 12, posted (9 years 5 months 4 days 3 hours ago) and read 8213 times:

Kappel,

Quoting Hammer (Thread starter):
It was getting pushed back from the gate and as they were turning it during pushback, a support bar broke and the gear twisted and shreaded 2 tires..



I live in the US but my heart is in Jerusalem!
User currently offlineHammer From United States of America, joined Jul 2001, 689 posts, RR: 2
Reply 13, posted (9 years 5 months 4 days 3 hours ago) and read 8211 times:

It didn't break off, it was twisted sideways...and it does not happen often at all...

User currently offlineBoeing764 From Canada, joined Apr 2001, 298 posts, RR: 0
Reply 14, posted (9 years 5 months 4 days 3 hours ago) and read 8172 times:

For those of you that go by the aircraft registration Northwest's aircraft #6304 is N664US

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Photo © Art Brett




From Dr. King's America to Nelson Mandela's Africa, the journey of equality moves on.
User currently offlineAhdharia From United States of America, joined May 2004, 81 posts, RR: 0
Reply 15, posted (9 years 5 months 4 days 1 hour ago) and read 6892 times:
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The flight status shows that NWA #25 departed on-time from DTW - NRT at 2:30pm. How did they move pax to a different aircraft and still have an on-time departure?
Also I dont think they have spare 744's in DTW.


User currently offlineHammer From United States of America, joined Jul 2001, 689 posts, RR: 2
Reply 16, posted (9 years 5 months 4 days ago) and read 6416 times:

A/C#6307 came in from a different city and was due to overnight in DTW, when 6304 broke, they switched it....it left at 6:43 p.m...not 2:30....

User currently offlineLightsaber From United States of America, joined Jan 2005, 13534 posts, RR: 100
Reply 17, posted (9 years 5 months 3 days 23 hours ago) and read 5710 times:
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Quoting TGV (Reply 7):
Can we assume it is this kind of incident that leads to have this type of tests for new aircraft ?

True! Most testing is required to keep from repeating prior mistakes.

Quoting HAWK21M (Reply 8):
Probably a Sheared LG Pin weakened in a Prior "Unreported Heavy" landing.

Most likely the root cause.

Quoting Kappel (Reply 11):

That must have been some heavy landing!!!! Does this kind of stuff happen often?



Quoting Hammer (Reply 13):
It didn't break off, it was twisted sideways...and it does not happen often at all...

Twisting/breaking is very vary rare. Shearing the pins... isn't unheard of. Not common, but not rare. In the 747 family of aircraft the pins are made from a steel that is a bit more fracture sensitive than is ideal for such a "shock loaded" application. Obviously the 747's incredibly good safety record speaks for itself, so this isn't something to worry about (unless your the mechanic).

When I read about this on a.net I walked out to our B742 and stood under the gear imagining how the hell could that massive center gear break? As I stood there a fellow engineer came up and asked why I was standing in an odd area... He noted (after I explained this NW incident) that when he had worked, in a past life, landing gear replacement they once had a B744 come in with three pins sheared on one of the center landing gear legs! (Out of six pins.) Yikes!

Lightsaber



Societies that achieve a critical mass of ideas achieve self sustaining growth; others stagnate.
User currently offlineKappel From Suriname, joined Jul 2005, 3533 posts, RR: 17
Reply 18, posted (9 years 5 months 3 days 21 hours ago) and read 4981 times:

BWI757,

Quoting BWI757 (Reply 12):
Kappel,

Quoting Hammer (Thread starter):
It was getting pushed back from the gate and as they were turning it during pushback, a support bar broke and the gear twisted and shreaded 2 tires..

I made the remark of the heavy landing because of this post:

Quoting HAWK21M (Reply 8):
Probably a Sheared LG Pin weakened in a Prior "Unreported Heavy" landing.
Any Pics.
regds
MEL

I know it couldn't have happned just because of push-back, what kind of toy-landing gears would that have been!?



L1011,733,734,73G,738,743,744,752,763,772,77W,DC855,DC863,DC930,DC950,MD11,MD88,306,319,320,321,343,346,ARJ85,CR7,E195
User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 19, posted (9 years 5 months 3 days 16 hours ago) and read 4178 times:

So any Update to the cause.
regds
MEL



Think of the brighter side!
User currently offlinePhilSquares From , joined Dec 1969, posts, RR:
Reply 20, posted (9 years 5 months 3 days 16 hours ago) and read 4142 times:

Quoting Hammer (Reply 16):
Quoting HAWK21M (Reply 8):
Probably a Sheared LG Pin weakened in a Prior "Unreported Heavy" landing.

Most likely the root cause.

Doubt if it was an "unreported heavy" landing. The 747-400 and other newer generation aircraft have a Central Maintence Computer. Works great and has all sorts of interesting info contained in it. One of them is the landing exceedence report. If there is a heavy landing it will spit out a report via acars and everyone in the world will know. So, I rather doubt alleged unreported heavy landing was the root cause.


User currently offlineNZ1 From Australia, joined May 2004, 2276 posts, RR: 25
Reply 21, posted (9 years 5 months 3 days 9 hours ago) and read 3935 times:
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FORUM MODERATOR

Quoting Vikingair (Reply 9):
Could be that the body gear steering locked up.

Not likely. We tow 744's all the time with B/G steering off, system 1 not running, and have never had a problem.

NZ1


User currently offlineHAWK21M From India, joined Jan 2001, 31712 posts, RR: 56
Reply 22, posted (9 years 5 months 3 days 4 hours ago) and read 3650 times:

Quoting PhilSquares (Reply 20):
One of them is the landing exceedence report. If there is a heavy landing it will spit out a report via acars and everyone in the world will know.

Manythings are known only to Mx  Smile
regds
MEL



Think of the brighter side!
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