Air France A380 loses engine fan and inlet cowling

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Diesel-3 » Mon Oct 02, 2017 2:52 pm

Was this a RR trent, or a SNECMA/?????? equivalent?
I think they use the Engine Alliance GP7200 (Pratt and Whitney and GE)
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by MadMacs » Mon Oct 02, 2017 3:16 pm

My gut instinct says that a crack developed around the flange (maybe incorrect torque sequence) that eventually led to the whole fan falling off. I would imagine that the core was still going but would have caused some vibration and be shutdown.
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by MadMacs » Mon Oct 02, 2017 3:22 pm

Romeo E.T. wrote:
GL wrote:Fortunate seems to be no significant damage to airframe. There was a fan separation where large bits impacted the fuselage.
or worse, the separating fan damaging or removing the other engine on the same side...ala EL AL Cargo in Amsterdam

I did notice possible pylon damage from the short on board video clip taken from behind, maybe there is other wing damage that we haven't yet seen.
Or ZS-SPF flying for LAM in Maputo. Luckily they had a traveling engineer on board who kept the crew updated as to what was happening.

http://www.747sp.com/zs-spf-engine-failure-maputo/
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Aerodon » Mon Oct 02, 2017 8:05 pm

Looking at the engine photos, looks as though the shaft is stationary. So the vibration supposedly reported might have been aerodynamic buffeting.

Next 'major airport' is probably Quebec City, almost 600nm away. Who knows what the weather was like there, and given the atmosphere on board, I'm sure everyone was happy to be on the ground sooner rather than later. With this amount of damage its would be hard to argue that Goose Bay was not the 'nearest suitable airport'. And given that the parts probably have to be flown from France, and the plane ferried back to France, its not a bad location.

Airport was reported as not having a suitable 'air bridge', but did have stairs that were used. I suspect that remaining on the plane might have been one of the more comfortable options given the location.

Some 747's have dropped engines with no major damage. Others have had catastrophic failures when literally loosing an engine (ElAl). Others have damaged the airframe beyond repair.

It will be interesting to see how much the airframe was damaged - looks fairly light to me (compared to Quantas).

Overall, an incredibly good outcome.

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Romeo E.T. » Mon Oct 02, 2017 10:52 pm

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Romeo E.T. » Mon Oct 02, 2017 10:53 pm

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Romeo E.T. » Mon Oct 02, 2017 10:54 pm

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Romeo E.T. » Mon Oct 02, 2017 10:54 pm

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Walter105 » Mon Oct 02, 2017 11:34 pm

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Re: Air France A380 loses engine fan and inlet cowling

Unread post by Thermalator » Tue Oct 03, 2017 12:09 pm

It is built around an 0.72 scale of the GE90-110B/115B core [1] and contains a Pratt & Whitney fan and low-pressure system design.
I have a suspicion this may trigger a deep dive into how closely the engineers comunicated between these 2 companies that built this mongerel !
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by danie.e » Tue Oct 03, 2017 12:17 pm

What is that yellowish/brown stuff in the good engine and on the blade tips - is that normal?
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by RiNCEw1ND » Tue Oct 03, 2017 1:40 pm

danie.e wrote:What is that yellowish/brown stuff in the good engine and on the blade tips - is that normal?
That brown "ring" around the fan is the fan blade rub strip. Perfectly normal.
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by kosmonooit » Wed Oct 04, 2017 10:44 pm

Nice close-ups!

So its clear the fan disintegrated, shearing off the spinner it was mounted on and destroying the cowling. Major wobbly! Was the cowling designed to self-destruct like that? One can see the machined Al lattice structure and the honeycomb ablative impact absorbing material there.

Question will be - materials / design failure or foreign object ingestion? guess the investigation must be asking that question quite seriously because if is the former, that would mean there are 'issues' that have to be addressed pronto.
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by shadow » Wed Oct 04, 2017 11:06 pm

Wouldn't say that its "clear " the fan disintegrated, to me it looks like it all came off intact, otherwise it would have disintegrated the fins behind the fan. They look to be in perfect condition.
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Re: Air France A380 loses engine fan and inlet cowling

Unread post by richard C » Thu Oct 05, 2017 8:35 am

Lucky the whole assembly didn't travel through the fuselage or the adjoining engine.

Would it have sprung off travelling ahead of the aircraft like a propeller tends to do if it breaks free ?
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