The tan covering around the fan casing is acoustic dampening and also intended to capture smaller parts almost like a bulletproof vest. Behind is the accessory case/gearbox which contains or drives (amongst other things) electrical generator, hydraulic pump and engine oil pumps.
So even with the fuel valve shut off there is still plenty of hydraulic oil and engine oil that will burn. Composite materials may have been covered in fuel or oil during the initial failure.
In short, there’s plenty to burn for at least a short period of time.
Engine fire suppression bottles may be less effective with that much cowling missing.
So it may just have to burn itself out.
* This is an exceptionally rare and spectacular failure but it’s not as potentially catastrophic as it looks.
If you’re an ER doctor this is a shallow wound with lots of blood if you will.
No damage to the wing or fuel tanks, no damage to the fuselage, no explosive decompression, no damaged flight controls.
Just really spectacular
