AffordablePlanesWhen
Filing Flight Plan
My money is on a late touchdown and the spoilers not deploying after touchdown on a wet runway (I am not sure if it's grooved) leading to brake ineffectiveness and hydroplaning.
I've ran the various B767 LE Slats or TE Flaps non-normal checklist every year in the PC and it does take 10 full minutes to run if you're fast (and expecting it).
Juan Brown (former B767 driver) did a video regarding thr incident as well: