The FAA could ban him from US airspace, even if they can't pull his ticket.

It's somewhat unlikely that the DGAC would let him off scot-free. I imagine they will take some action, which in the spirit of ICAO should satisfy the FAA. If DGAC lets him completely off the hook for reasons such as family or political connections, then the FAA would be justified in throwing their own flag.

But I'm thinking this is not quite revocation material, maybe a suspension. It depends on whether they they consider an ATPL taxiing a 500+ pax airliner at high speed in a congested area as reckless.

I don't think they pull tickets just for misjudging wingtip clearance...stuff happens. It's the high speed and the warning from ATC that's going to raise eyebrows.

The real punishment is going to come from AF, I can't think of why they wouldn't fire him. His fate really rests with his union...can they get his job back later?