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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 3 months 5 days 5 hours ago) and read 13922 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, 6161 posts, RR: 24
Reply 1, posted (9 years 3 months 5 days 5 hours ago) and read 13879 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, 3598 posts, RR: 20
Reply 2, posted (9 years 3 months 5 days 5 hours ago) and read 13859 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 3 months 5 days 5 hours ago) and read 13852 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 3 months 5 days 5 hours ago) and read 13838 times:

to NRT and yes here in DTW

User currently offlineAsstChiefMark From , joined Dec 1969, posts, RR:
Reply 5, posted (9 years 3 months 5 days 5 hours ago) and read 13803 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 3 months 5 days 5 hours ago) and read 13780 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 3 months 5 days 2 hours ago) and read 13427 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, 31684 posts, RR: 56
Reply 8, posted (9 years 3 months 4 days 21 hours ago) and read 12978 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 3 months 4 days 17 hours ago) and read 11274 times:

Could be that the body gear steering locked up.

User currently offlineTheredbaron From Mexico, joined Mar 2005, 2256 posts, RR: 9
Reply 10, posted (9 years 3 months 4 days 15 hours ago) and read 9858 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 3 months 4 days 13 hours ago) and read 8653 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 3 months 4 days 12 hours ago) and read 8174 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 3 months 4 days 12 hours ago) and read 8172 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 3 months 4 days 12 hours ago) and read 8133 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 3 months 4 days 10 hours ago) and read 6853 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 3 months 4 days 9 hours ago) and read 6377 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, 13258 posts, RR: 100
Reply 17, posted (9 years 3 months 4 days 8 hours ago) and read 5671 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 3 months 4 days 7 hours ago) and read 4942 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, 31684 posts, RR: 56
Reply 19, posted (9 years 3 months 4 days 1 hour ago) and read 4139 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 3 months 4 days 1 hour ago) and read 4103 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 New Zealand, joined May 2004, 2268 posts, RR: 25
Reply 21, posted (9 years 3 months 3 days 18 hours ago) and read 3896 times:
AIRLINERS.NET CREW
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, 31684 posts, RR: 56
Reply 22, posted (9 years 3 months 3 days 13 hours ago) and read 3611 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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