I'll Nibble at infrequentflyer's conclusions.
Should the Regulator have foreseen a tyre burst as potentially causing a castastrophic Fire? Emphatically, YES. That was the upshot of the entire Tyre "problem".
Should the Mechanic have foreseen such a catastrophe? Emphatically, NO.
We see the Titanium Strip post crash. Hardware store rivets fastened haphazardly by an indifferent "Expert"? Irregular indexing of attachment points? Boy Howdy.
Why are we focused on the Metal? It is the "craftsmanship" that gets my attention.
Should the Mechanic have foreseen his "Rub Strip" falling Off?? Boy howdy.
bear