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Cracks Found in Airbus A380 Wings
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2012-03-14
The European Aviation Safety Agency (EASA) has ordered the inspection of all Airbus A380 superjumbos following the detection of cracks in the wings of several aircraft, The Conversation reports.
Cracks were first discovered in December on an A380 that was being repaired after an engine explosion in Singapore.
The cracks reportedly are being attributed to the manufacturing process used at Broughton, UK, where the wings are made.
"This manufacturing process may be related to the combination of the use of “interference-fit” fasteners (where the hole is slightly smaller than the fastener diameter) and the loads being applied when the wing skin is attached to the wing," The Conversation reports.
"If the high loads being applied to the fasteners during assembly are not adequately accounted for, they will combine with the stresses arising from the interference fit, potentially leading to cracking. The particular type of aluminium alloy used will also affect this joint behaviour where a balance has to be achieved between stiffness, strength and fracture toughness."
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reference from FIN, arrange by Fastener World
 
 
2012-03-14

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