As a 777 cpt I am very interested to know what happened,
I don't have any speculations, sorry.
I know how I feel sometimes after a 10, 11 hr. flight, maybe a bad night sleep before departure, and then to experience major difficulties just before landing....no thanks.
I am very glad for the pilots to hear there are no fatalities; as events will be going through their head again and again, they won't have the extra burden of loss of lives and the emotional impact of that.