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Gatwick incident

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Gatwick incident

Old 8th Apr 2008, 12:54
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Gatwick incident

in case anybody is wondering, we've heard that a plane burst one of its tyres on landing. nothing too serious
ian shoesmith
bbc news

Last edited by shoey1976; 8th Apr 2008 at 12:57. Reason: clarification
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Old 8th Apr 2008, 12:57
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.

anybody got any more info?
thks
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Old 8th Apr 2008, 14:28
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Must be a slow news day Ian As a regular PPRuNer you must well know by now that aircraft bursting tyres is not all that uncommon. Probably dozens of cases around the globe on any given day. Granted, it may cause a few delays for a little while but that's about all. Not really a news item of interest in my books (unless it narrowly avoided a hospital and an infant school of course).
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Old 8th Apr 2008, 14:36
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(unless it narrowly avoided a hospital and an infant school of course)
The tyre or the aircraft?
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Old 8th Apr 2008, 14:40
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nah didnt think it was much -- certainly won't make the national bulletins and would be extremely surprised if it makes regional....

sometimes there is more to an incident than immediately seems obvious, that's all, so I was just checking.

Classic example of this were the "power surges" reported on the Tube on 7/7... initially nobody thought anything was seriously wrong.

A good 90% of the stories we investigate turn out to be false-alarms, or not newsworthy.

thanks
ian
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Old 8th Apr 2008, 14:51
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I can't actually believe this has made it onto the forum. A/c landed, suspected burst tyre, 2 a/c initiated missed approaches, runway inspection followed. Big deal.
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Old 8th Apr 2008, 14:53
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Hold on a minute while I turn the capital letter function off.

thats better, well no, but i was driving home from gatwick this mrng on the m23, south of the crawley turn off, and noticed that a honda accord had blown a tyre. it was sttng on the hard shoulder with an rac van in attendance with a flashing orange light going.

didnt look too serious either as the occupants were milling about on the grass verge, one talking on a mobile phone. may be more on south today at 6 thirty.
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Old 8th Apr 2008, 15:00
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Actually, ian, just as a blowout on the M23 is not something that 99.99% of drivers plan for, a burst tyre on a plane isn't exactly as insignificant as some would have you believe.

It is in every case an indication of something failing.

Likely causes springing immediately to mind be undetected debris on the runway a la Concorde disaster, prior undetected damage to the runway surface, or prior undetected damage to the tyre including under or over-inflation. Other causes might include excessive speed on landing, heavy landing, or perhaps overheating of the brakes prior to undercarriage up as in heavy braking on previous landing and quick turnaround with inadequate cooling period prior to next flight leading to wheels stowed hot.

If dozens burst around the world daily, then a perfectly valid question might be "Why's that then?"
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Old 8th Apr 2008, 15:38
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I am guessing but, an aircraft tyre, despite its composition of rubber compounds and reinforcing nylon, is pressurised with Nitrogen gas to an internal pressure of around 200 pounds per square inch (the accord was probably around 30 pounds per square inch). It spends its life sitting in ambient temperatures of anything from 40+ degrees C to -60 degrees C in a timeline as short as 30 minutes. It is subject to the heat /pressure stresses of having to support ( shared with its friends ) maybe 100 to 300 tonnes of structural mass bearing down upon it. It then has this same load bouncing up and down upon it as it navigates its way around runways, taxiways and aprons of various quality and repair around the globe. It is subject to large centrifugal loads and large shock loads as it has to accelerate from taxiing speed to 200 mph in a little over 60 seconds. It is then required to spin up to around 150 mph from zero in a fraction of a second by the subtle action of being dropped out of the sky on to tarmac of similiar varying quality, with anything up to 200 tonnes + of mass bearing down on it with an added force of maybe 700 feet per minute driving all that mass to impact. Then it is heated up by the retarding force of heavy duty brake units, only to be further assaulted by more taxiing pneumatic stresses. Add to this the odd bit of clumsiness, debris, and unforseen abuse. Then some cornering stresses. All of this heat build up is protected by fusible plugs that can allow the tyre to gently die rather than simply bursting. It really isn't that surprising that sometimes tyres simply give up.
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Old 8th Apr 2008, 15:49
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Originally Posted by slip and turn
If dozens burst around the world daily, then a perfectly valid question might be "Why's that then?"
And here starts another ill-informed rant from the armchair (by the side of which rests today's edition of the Daily Mail).

Sorry, but I seem to recall trying to put a reasoned and professional view up against an s & t rant......but gave up in the end!

As for "Why's that then?", see Bealzebub's explanation.
 
Old 8th Apr 2008, 16:14
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+1 on what you said Spitoon...and btw, S & T, I was the approach controller that worked the a/c and the subsequent go-arounds, hence I can tell you that it was a non-event.
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Old 8th Apr 2008, 17:10
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I was driving home from gatwick this mrng on the m23, south of the crawley turn off, and noticed that a honda accord had blown a tyre. it was sttng on the hard shoulder with an rac van in attendance with a flashing orange light going.

Any schools or hospitals nearby?
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Old 8th Apr 2008, 17:18
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No, but....

It had a "Duke of Edinburgh award" sticker in the back window !

Fishy or what ?
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Old 8th Apr 2008, 17:33
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maybe 100 to 300 tonnes of structural mass
Is that a with/without Americans on board range??
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Old 9th Apr 2008, 13:56
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surely there must have been some bunny rabbits on the verge?
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Old 9th Apr 2008, 14:37
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once i saw a copper jump out and wave my car to the side of the road, to issue me with a ticket for speeding (yeah, i got a warning, phew, no ticket, good cop)...
This was near a school, if it has any relevance..
My mother also experienced a blown tyre near the same school too!

one more thing:
I did however see a serious 3 car accident, and the 3rd car was an ambulance, that was on a main road, no hospitals or schools near.. well, hospital 2km down that road.. that's all, I remember seeing 4 popped tyres on that day too!
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Old 9th Apr 2008, 14:38
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Talk about reading into a message what you want to be there! The guy was only confirming that it was a non-event not reporting it as a major catastrophe! Shame he didn't just put it on the BBC website with the hyperbole you so enjoy, then you could really get foaming at the mouth!!
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Old 9th Apr 2008, 18:12
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Spitoon / mr. 777 , and other sundry non-eventers, no need to throw toys out of prams

Yes Beazlebub explains what punishment tyres have to take and goes some way to describe how they are designed to take it, but they are not supposed to / or expected to burst when you need them most, are they?
None of you non-eventers can with any accuracy predict what might happen next if a tyre bursts. So the query (and it's just a query, not a rant) is still valid - yes we know all know what can happen in the lifetime of a tyre and what weakens tyres, so with all the monitoring and control that's assumed to be undertaken in the world of aviation, why's so many burst every day then before they are replaced ?

Was this a debris on the runway incident mr. 777, or a tyre dying gracefully occasion ? Can't call it an event now, can I?
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