To change topic slightly, I'm curious about the firefighting aspect of this.
From the videos, the fire is on the underside of the wing, doesn't appear to have spread to the ground. So the flammable fluid must be coating the wing.
The foam is being sprayed horizontally. It seems like the thin wing would give a narrow "target", meaning the foam would have to hit the leading or trailing edges else it just shoots past parallel to the flaming surface and wouldn't have much effect.
It seems like it would be easier to attack the a at an angle to the surface on fire, eg if the hose nozzle were closer to the ground aimed upwards. Then the foam/fluid spray can spread out across the surface as it were, getting more effect per unit of time/fluid.
Obviously they got the fire out so it worked. I'm just curious if anyone knowledgeable can speak to how they attack this kind of fire.