I've just seen multiple photos. Very uncontained unless there's a new definition.
Depends, the engines are only expected to not burst their cases.... nothing is said or expected regarding an aircraft supplied part like a inlet nacelle or tailpipe.
Of course in any event, aircraft damage that might affect another system must be minimized to the smallest practical extent.
Looks like a piece of fan blade might have come forward of the engine case and out through the inlet cowl down and away from the aircraft. It has happend before and as long as it's only pieces of a blade and not a whole fan disk set the history has shown the consequences to be not very hazardous.
Of course with these composite inlet outter skin the hole it makes are lot bigger than the piece. With the old style aluminum skin nacelles the holes were much smaller.
BYALPHAINDIA:
The problem in manufacture with the CFM56 fitted to G-OBME was fixed across the fleet very shortly after the incident. The main problem highlighted by that accident was that the 733-734 conversion training was lacking important information (like where the bleed air from the engines came from between the two variants). The second incident was an improper maintenance procedure that left the o-ring seals off the engine, causing them to vomit oil.
Looks like the whole fan spinner has been eaten for lunch. Lots of blades liberated.
Well at least the engine fan case forward extension is intact and has absorbed the brunt of the energy before shoveling the debris forward into the soft aluminum. What's left of the inlet doesn't look like much to hang onto.
I presume we'll be hearing more about this from official sources.
is the lack of a nose 'cone' (covering the bolts, etc) on the front the fan usual for an failure like this?
very unusual and hopefully quite rare.
Damn expensive throughout the engine and nacelle and typically self insurred at the engine level. Of course the mounts survived since they are not designed to break away at this level of damage
I'm surprised to see how flimsy the "containment" structure is forward of the fan
I'm not sure what you describe as a containment structure. Immediately in front of the fan blades is an engine structure that appears to be intact and unbreached, having absorbed all the energy delivered to it. Foward of this structure and bolt flange is an aircraft structure, designed for aerodynamic and sound attenuation purpose.
From a safety of flight standpoint, the escaped pieces beyond the engine case forward extremeties, may have had the majority of their energy adequately diminished to minimize the possibility of holing a pressure vessel, fuel tank or another engine. The eye typically sees extent of damage $$$ and only together with analysis can one assess the impact to continued safe flight and landing.
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