PC800 said:
For instance, there are several airports southwest of Chicago in fairly close proximity to each other (in the vicinity of the Joliet VOR)-- and if an airplane that I ass-um-ed was going to go direct to one of them was to make a surprise 360, it could easily impact (pun intended <g>) an aircraft going to one of the others.
Right, I agree that if you had an airplane that you assumed would be proceeding direct to an airport say 12-15 miles away, and he was suddenly doing something other than going in that direction, I'd agree that would cause problems, and it would be the pilot's fault.
That's not the situation though, according to what we've been told, the plane was *over* the airport, not proceeding to it. It was *in* the traffic pattern. (although a little higher than it should have been) How close do you vector transient aircraft to others within the traffic pattern of an uncontrolled airport?
Assuming he was over the airport, and assuming he really did have a 260 knot groundspeed (unlikely, it was probably quite a bit less) a standard rate turn would take him 2.8 miles from the airport. Let's say a downwind is 1 nm out So this 360 (or really 315) turn would put him maybe 2 miles outside the downwind of leg of the pattern. So that raises the question in my mind, are you vectoring aircraft to within 2 nm of the traffic pattern of an airport where you've just cleared an aircraft for a visual approach?
Again, unless I'm missing something (and I may be) a non-towered airport is one-in, one-out. and you've already got one in. It would seem from my perspective that if the controller vectors another airplane into the airspace *immediately* (less then 3 nm radius) surrounding a non-controlled airport where an IFR aircraft is manuvering to land, without seperating by altitude, it's really the controller who has caused the problem here.
Unless I am misunderstanding the scenario, the only way a conflict could have occured was if the controller vectored another aircraft *through* the traffic pattern area (or very close to it) at an altitude *below* the altitude the original poster was at when he received his approach clearence. (again, we're not talking about a turn he executed when he *should* have been proceeding directly to the airport, we''re talking about a turn when he's already over the airport, a turn whic probably doesn't take him farther than 3 miles from the airport.
So you really haven't answered my question, what should he have done, at 5000', over the airport?
You said he should have replied "unable". OK....... "unable" what? What are you expecting him to do? I know it wasn't you, but put yourself there in the controller's position. The guy's at 5000' over his destination airport, you clear him for the visual, what do you expect him to do? (I mean other than say "unable", advise you of unusual manuvers, or other communications things.) Physically, what path would you expect him to fly the airplane along fom 5000' over the airport to the runway? That's not a rhetorical question, I seriously would like to know, what are your expectations in that situation?
PC800 said:
That's just not strong enough-- telling the controller about such an unusual maneuver is mandatory, whether it's at O'Hare or Podunk International. Getting "yelled at" by the controller is the least of the consequences a pilot should expect if he doesn't.
OK, what is "unusual" to you? As I mentioned before, the AIM recommended procedures at a non-towered airport are 1.) joining the downwind on a 45. 2) not descending to pattern altitude in the pattern. The FAA's flight training handbook also contains these same recommendations. Now, if you are over the airport, above TPA, there is one way and one way only to follow these recommendations, and that is manuuver and descend outside the downwind to join it at a 45, at TPA. Now, that's not to say that some pilots wouldn't hop over onto the downwind and descend in the pattern. that may be, but without question they are not following the FAAs recomendations. The guy who does a 360 to descend and join on a 45 *is* following the FAA's recommendations.
Now, my point is this, if your expectations as a controller are that a pilot will disregard the FAA's recomendations, and if you formulate your seperation strategey so that seperation will be lost if the pilot does exactly what the FAA reccomends, perhaps the problem is not with the pilot.