A380 Singapore Airlines Incident
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A380 Singapore Airlines Incident
Singapore Airlines has received its second A380, the world's largest passenger plane
According to Singapore Airlines, a tow truck was pulling the plane forward to a take-off position, when it suddenly disconnected from the plane.
The Sydney-bound flight, carrying 446 passengers, then continued to move forward and its front wheels rolled onto a nearby grass verge. All the passengers were asked to disembark.
http://www.channelnewsasia.com/stori...322056/1/.html
According to Singapore Airlines, a tow truck was pulling the plane forward to a take-off position, when it suddenly disconnected from the plane.
The Sydney-bound flight, carrying 446 passengers, then continued to move forward and its front wheels rolled onto a nearby grass verge. All the passengers were asked to disembark.
http://www.channelnewsasia.com/stori...322056/1/.html
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I note that the original thread on this topic "SQ A380 off paved surface in Singapore" has been closed, but it appears that a major item visible on picture A380-5 clearly shows that the right wing bogie, front outer wheel is fractured around the hub, and is effectively only being held on the axle by the weight of the aircraft whilst stationary.
Expert opinion suggests that this is the result of:- "More on the Wheel Hub Failure. For the wheel to fail that way. ALL of the attaching wheel bolts would have to have been over-torqued. Over-torquing produces stress cracks in the wheel metal surrounding the bolt holes. Once the stress cracks join up, everything will let go at once. In this case (LUCKILY), this happened while the aircraft was being towed and not on landing. On landing, the crew would have no warning until the wheel flew off and that bogie assembly started dragging. Let's face it, as is, there are NO bolts holding the wheel on."
Checking picture A380-1 shows that the wheel appears to be displaced laterally outwards.
This apparent damage surely would not have resulted from simply rolling backwards off the apron onto grass?
Expert opinion suggests that this is the result of:- "More on the Wheel Hub Failure. For the wheel to fail that way. ALL of the attaching wheel bolts would have to have been over-torqued. Over-torquing produces stress cracks in the wheel metal surrounding the bolt holes. Once the stress cracks join up, everything will let go at once. In this case (LUCKILY), this happened while the aircraft was being towed and not on landing. On landing, the crew would have no warning until the wheel flew off and that bogie assembly started dragging. Let's face it, as is, there are NO bolts holding the wheel on."
Checking picture A380-1 shows that the wheel appears to be displaced laterally outwards.
This apparent damage surely would not have resulted from simply rolling backwards off the apron onto grass?
