This is an interesting accident as they had already performed a G/A from a similar position earlier which seemed to go OK, so why the LoC after the second one? From the initial reports, it seems they climbed away to a decent altitude but then descended rapidly to crash within the airfield perimeter.
If the fuel load and flight timings are to be believed, after substantial holding they appear not to have been under time pressure, even keeping an alternate.
A windshear issue seems less likely as they had plenty of energy (height & speed combined) plus the climb potential at their weight and density altitude would have been very good. No pan, mayday or even a hint of a problem, so logically it was sudden/startling. Even a dual flameout in rain/hail wouldn't lead to the RoD we see on the flight traces and video - that was really “falling out of the sky” material.
