Would you declare an emergency?
No... maybe a Pan-Pan, although explaining it in common English would have probably been enough. But the PIC explained it clearly, and erring on the side of caution was not uncalled-for here.
Would you go back to Runway 29 or opt for the closer Runway 24?
Whatever's closest, but forget the wind- if fire or smoke is waiting in the wings, I just want a runway in front of me.
Would you stop next to the waiting fire truck?
Absolutely.
Would you park next to another aircraft on the ramp?
I would try to avoid that, unless the fire truck was right there.
Would you put a camera there?
No way. I'm sure it's tiny and properly mounted, but it is
a balanced control surface, and a pretty critical one. How many ounces at what station is enough to induce flutter with that airplane at such-and-such speed? I don't know, but if I never
stick something on a control surface that is critically balanced, I'll never have to find out.
Would you post the video on You Tube?
Given the previous question: No! Messing with balanced control surfaces is not only stupid, it's against regs. The FAA has more to say about camera mounts in general, but this one is pretty obvious. If there is possibly an STC for this setup, though, I apologize.
Would you simply continue the flight?
I don't know these airplanes, but if it was unusually fumey, I would come back for a precautionary landing.
I've only made one precautionary call as PIC. I didn't even say "Pan-Pan", because it was pretty silly... stuck pitot cover flap on a Champ on takeoff... I was able to chop and drop it right back on the runway, climb out on the taxiway while idling, and flick it free. I could have done just fine without the ASI that day, but I was new to the type and I didn't want to continue without it. If it had happened while I was out and about, I'd have just carried on, and enjoyed the challenge. But an inop ASI in a Champ is not critical, really.
Does it make a difference whether the aircraft is high-wing or low-wing?
No. Gravity or pump-fed, there should be a shutoff (which you should immediately shut off if you suspect fuel is leaking). If there is an electric pump, you should shut it off.
Come to think of it, unless you can see that it's a leak prior to the valve (like a missing tank cap or wing tank leak, etc), away from the engine, you should secure the engine. that means an engine-out landing, but hey, at least you won't be burning while doing it. And if a wing is on fire, well, the question is maybe "wood spar or metal spar?" Aluminum burns quite nicely, but usually slower than wood. Especially old dry wood.
Does it make a difference that the plane is recent or older vintage?
I don't think so. If you are making the call to land immediately, your decision depends only on what seems abnormal to you for that aircraft.
In declaring an emergency, what would you say?
Assuming I'm officially declaring and I'm the PIC in this Cirrus, I'd say "Maydaymaydaymayday N-number fuel malfunction returning immediately to land." Or something like that.
Would it make a difference if there were passengers?
For me, it would just be a psychological factor that I would just have to set aside so I could think clearly. But an abort is an abort... I'm a "women and children first" kinda guy, but in a light airplane crash, that doesn't matter much.