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-Short Attention Span Theater-
Cracks found in the wings of three Airbus A380s
2012-01-13
Australian aircraft engineers have called for Airbus A380 - the world's biggest passenger aircraft - to be grounded, after Singapore Airlines and Qantas found cracks in the wings of their super-jumbos.

'We can't continue to gamble with people's lives and allow those aircraft to fly around and hope that they make it until their four-yearly inspection,' said Steve Purvinas, secretary of the Australian Licensed Aircraft Engineers Association.
Or the wings fall off, whichever happens first.
Both airlines, and Airbus, admitted that they had discovered cracks, but maintained that the aircraft were safe. In total, 67 Airbus A380s are in use worldwide, on seven airlines.The aircraft are in use by Qantas, Singapore Airlines

'We confirm that cracks were found on non-critical wing attachments on a limited number of A380s,' an Airbus spokesperson said today.
And if you see bits off the wings suddenly fly past your window at 40,000 feet, pay no attention.
'We've traced the origin of these hairline cracks, and developed an inspection and repair procedure which can be done during routine maintenance.'
Really, they're very, very thin cracks. Nothing to worry about.
Singapore Airlines, the world's second-biggest carrier, operates 14 A380s already and has five on order, while Qantas has taken delivery of 10 of its order of 20 A380 aircraft.

The A380 has been in service for five years. It seats 525 passengers in a typical three-class arrangement. In total, 238 of the aircraft have been ordered by 17 airlines worldwide.

The aeroplanes are assembled in Toulouse, but parts are built across Europe, with the wings being built in Broughton, Wales.
Who built the cracks, is what I want to know.
Ukraine. They're really good at building cracks. Ask anyone who's flown an Ilyushin...
Singapore Airlines (SIA) and Qantas Airways said on Friday they discovered cracks on the wing ribs of their Airbus A380s, but said the cracks pose no threat to safety and repairs have been carried out.
Gee. I remember a time a few years back when Space Shuttle engineers overruled in a similar fashion by far more knowledgable executive types. Sorta makes you wonder why they even bother to hire engineers, really.
The remarks came after Airbus said on Thursday that engineers discovered minor cracks in the wings of a 'limited number' of A380s, but said the cracks were not affecting the safety of the aircraft.

'Cracks were found on a small number of wing rib feet on an Airbus A380 during inspections in the second half of last year. These pose no safety issue and repairs were carried out on the aircraft,' SIA's spokesman Nicholas Ionides said in an email.

'Repairs were subsequently carried out on a second aircraft. We have kept the relevant regulatory authorities fully informed and will be carrying out inspections and any necessary repairs on other A380s as they go in for routine checks,' he added.

Qantas separately said that 'minuscule cracking' was found in the wing ribs of the Qantas A380 being repaired in Singapore after one of its Rolls-Royce Trent 900 engines suffered a mid-air blowout in 2010.

'Investigations have found that the cracking is unrelated to the engine failure incident experienced by this aircraft in November 2010 and is not unique to Qantas. It has now been repaired,' the carrier said in a statement.

'No immediate action is required by A380 operators because the cracking presents no risk whatsoever to flight safety,' Qantas said.

A Lufthansa spokesman said: 'There is no findings on our side and we have normal operations.'

Airbus said it has traced the origin of the problem and developed an inspection and repair procedure that will be done during routine, scheduled four-year maintenance checks.
Or after a wing falls off, whichever happens first.
SIA, the world's second-biggest carrier by market value and the first operator of such aircraft, operates 14 A380s and has five on order, while Qantas has taken delivery of 10 of its 20 A380 aircraft on order, according to the airline's website.
Both Singapore Airlines and Qantas are using Rolls-Royce Trent 900 engines on their A380 fleets.
Posted by:gorb

#19  *happy sigh*. Another day of learning at Rantburg U.
Posted by: trailing wife   2012-01-13 23:39  

#18  Spent many years repairing cracks in aircraft, all over the damn things; a complete inspection to identify problems is critical. When the metal Intruder wings first failed (VA-128) it was a catastrophic failure that eventually led to the composite replacement wings.
If you look at my second favorite-est airplane, the Hornet ( sarc) those little vertical fences on the wings next to the fuselage are there to straighten out the airflow around the vertical stabs; the buffeting caused the mounting flanges to crack.
787 concerns: not with scheduled maintenance, but 'ramp rash;' metal airplanes leave dents ( witness marks) plastic doesn't, but can start a delamination internally. If the afore mentioned inspections don't catch it in time, there will be no 'small crack,' but a full failure of the area.
I'm going to give the Dreamliner 5 years in service before I climb in one.
Posted by: USN, Ret.   2012-01-13 20:44  

#17  he's sneaky that way
Posted by: Frank G   2012-01-13 20:43  

#16  Alaska Paul beat me to my post.
Posted by: Mizzou Mafia   2012-01-13 19:49  

#15  on the bright side if noone dies, this will keep lots of Euro-engineers in jobs.
Posted by: Kojack   2012-01-13 18:57  

#14  Ricky, the F-15 wasn't originally made with fly-by-wire (computer oontrolled flight systems), so the air frame had flight dynamics that allowed gliding in to a landing in some emergency situations. Fly-by-wire air frames are, in contrast, tend to to drop like a rock if they lose power to the flight control system, and the FCS can't necessarily compensate for damage to the wings well. Generalization but useful in thinking about such things ....
Posted by: lotp   2012-01-13 17:58  

#13  My Brother-in-law worked on the 787 and he is an aerospace engineer. The composite material allows bending and flexing without the fatigue. I.E. it can be pressurized and bent without the crystalline structure breaking down, since the composites allow the different crystalline molecules to pass the stresses on.

Think of it as a line of kids playing red rover and they all have hard carbon torsos and rubber arms. Now think of millions of those lines woven together. Pretty impressive stuff.

I will fly Boeing anyday over the Airbus.
Posted by: DarthVader   2012-01-13 17:23  

#12  Yes, Ricky, I will tend to agree with you, pending some years of ops experience with the 787. Lots of innovation, but a whole different technology.
Posted by: Alaska Paul   2012-01-13 16:08  

#11  Stop drill the ends of the cracks and go for broke, no pun intended.
Posted by: Alaska Paul   2012-01-13 15:55  

#10  Duct tape can fix 'er right up.
Posted by: rjschwarz   2012-01-13 14:43  

#9  If it ain't Boeing, I ain't going.

Ummm...I might have to draw the line at the 787 Dreamliner. Composite frame structures in the fuselage and wings? Okay, I'm not an engineer and I don't even play one on television, but my first instinct is that an airplane with plastic wings belongs on my 4 year old great-nephew's bookshelf, not 35,000 feet in the air.
Posted by: Ricky bin Ricardo (Abu Babaloo)   2012-01-13 14:37  

#8  that's why they have two wings - for redundancy

Truer than you may think, Frank. Rantburgers may remember this story (starts about 30 seconds in)...

Posted by: Ricky bin Ricardo (Abu Babaloo)   2012-01-13 14:31  

#7  If it ain't Boeing, I ain't going.
Posted by: Alaska Paul   2012-01-13 12:52  

#6  Socialism on the march ....
Posted by: Mike Ramsey   2012-01-13 12:26  

#5  Australian Licensed Aircraft Engineers Association - Union connected organization for Aircraft Inspectors and other maintenance personnel including the folks that clean the planes at the end of the day. Nothing to do with Aircraft Design. They are NOT Engineers, no more than a "Sanitation Engineer" would be.

To be taken with a grain or two of salt.
Posted by: tipover   2012-01-13 12:14  

#4  that's why they have two wings - for redundancy
Posted by: Frank G   2012-01-13 11:35  

#3  So a wing falls off, so what? Jets can fly on only one engine.
Posted by: Perfesser   2012-01-13 10:54  

#2  Remember in development the A380 only just passed it's wing bending tests. There was a bit of a scramble to beef them up, IIRC.
Posted by: Grunter   2012-01-13 10:41  

#1  I recall one (I think it was aircraft) design remedy was to put a slot where the cracks formed. A 'controlled" crack, because it doesn't grow beyond the slot.

Sometimes cracks for just because there needs to be a tiny bit of movement right there.
Posted by: Bobby   2012-01-13 09:34  

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