FullWings
"It certainly looks like substantial damage to the wing, so unless I’m interpreting it wrongly (not impossible as I’ve already done just that) there should have been a notification filed to the NTSB, unless anyone knows to the contrary?"
Some perhaps understandable confusion here.
Yes, the damage to the 737 will almost certainly be classed as substantial.
Yes, that will therefore qualify the incident as a notifiable (to the NTSB) event, as it no doubt has been.
But neither of those necessarily implies that the NTSB will conduct an investigation (though AAL and the DFW airport authorities almost certainly will). Nor have some similar events in the past.