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#2 |
Acolyte of the Probe
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Wow. Uncontained fan failures like that are rare for a reason.
Some unlucky mechanic is going to their license over this. |
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#3 |
OBSP developer
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This is the reason why for the longest time, the FAA would not allow two engine aircraft to fly over the ocean. Engines are more reliable these days, leading to the ETOPS rating. Today is just a reminder that failures like these do happen...
ETOPS = Engines Turn Or Passengers Swim The A380 is a safe aircraft, but this is the second serious engine failure... |
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#4 |
Scientist
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That makes one major engine issue for RR and now one for GE. It's a testament to the strength of the airframe that in both cases there were no casualties. |
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#5 |
Aperiodic traveller
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If you want a testament, you'll have to see what would happen after a turbine disk ruptures. Fortunately that never happened since the 50s or so. |
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#6 |
owner: Oil Creek Astronautix
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#7 |
Orbinaut
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Nice how the BBC interviewed the right passenger (and that a mechanic was on board for them to interview). I've seen far too many cases where the media just, e.g, interviewed random passengers after a cabin pressure loss and came out with a story to the effect of "passengers screamed in terror as the plane plummeted towards the ground" (i.e, there was a rather frightening falling sensation as the crew began a rapid descent towards breathable air).
---------- Post added at 18:19 ---------- Previous post was at 17:48 ---------- Quote:
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#8 |
Orbinaut
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I think its more of a indication of how close to the limit those engines actually operate.
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#9 |
Scientist
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I'd love to understand the failure modes and fluid dynamics for a main fan fail in cruise like this. Wild speculation on my part ... I could imagine driveshaft failure (with the fan rocketing forwards and then over the wing), or cascading failure of bearings or blades on the fan leading to enough asymmetry that the fan literally is shaken off (then forwards and up over the wing as well).
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#11 |
Bug Crusher
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#12 |
Scientist
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#13 |
Bug Crusher
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Yeah, they seem to be all single disk failure tests.
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#14 |
Orbinaut
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In other words, I expect all failures involving the mechanical failure of a rotating part to look pretty much identical from the perspective of the engine casing: a large number of blades break free and are thrown centrifugally into the casing, which, hopefully, does its job and catches them, whereafter they are caught by the airstream and pass out of the engine through the tailpipe (possibly causing similar blade-throws in the disks located aft of the initial failure point as they hit components downstream), or, if the casing doesn't catch them, they become shrapnel flying out perpendicular to the axis of the engine. |
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#15 |
Scientist
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Latest from Avherald.com: First observation of the engine suggests, the fan - the first rotating element - detached in flight dragging the air inlet with it. The damage appears to be limited to engine #4 and its immediate environment.
Seems like we may have a fairly unique failure here. |
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