AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Aurora GPS RWY 17 Question          AirTalk.org Forum Index -> Instrument Flight Rules View previous topic :: View next topic   Author Message Dennis Johnson Guest Posted: Mon May 07, 2007 10:48 pm    Post subject: Aurora GPS RWY 17 Question The GPS RWY 17 approach at Aurora State (UAO), Aurora, Oregon, contains a note near the top left: http://www.airnav.com/depart?http://204.108.4.16/d-tpp/0704/05722R17.PDF "Procedure NA for arrivals at UBG VOR/DME on airway radials 013 CW 085." There are two Victor airways to UBG, one on the 013 radial and the other on the 085 radial. What exactly does that note mean and why is that an issue? It sounds like the note prohibits use of this approach if you are arriving from the northeast (between the UBG 013 and 085 radials). But I can't see any obstruction issue or interference with another airport's traffic pattern, since the minimum altitude is 4,000' in an area near sea level. If you overflew UBG for 5 miles and then turned back to UBG, would that make the approach legal to fly? Dennis Johnson Back to top Ron Lee Guest Posted: Tue May 08, 2007 12:18 am    Post subject: Re: Aurora GPS RWY 17 Question "Dennis Johnson" <pinetownd (AT) volcano (DOT) net> wrote: Quote: The GPS RWY 17 approach at Aurora State (UAO), Aurora, Oregon, contains a note near the top left: http://www.airnav.com/depart?http://204.108.4.16/d-tpp/0704/05722R17.PDF "Procedure NA for arrivals at UBG VOR/DME on airway radials 013 CW 085." Could it be because the Portland airport is in that direction? Ron Lee Back to top Peter R. Guest Posted: Tue May 08, 2007 12:37 am    Post subject: Re: Aurora GPS RWY 17 Question On 5/7/2007 1:48:08 PM, "Dennis Johnson" wrote: Quote: If you overflew UBG for 5 miles and then turned back to UBG, would that make the approach legal to fly? Lake Placid, NY, has these types of restrictions on their GPS approaches. http://www.myairplane.com/databases/approach/pdfs/09371RA.PDF Upon preparing for the flight to LKP a few years ago I had seen the note on the above chart and asked a more experienced IFR pilot about it. He told me that these types of notes are common when the required course direction change after the IAF is too great. TERPS doesn't want aircraft making that large a course change in the clouds, presumably in this case due to the nearby mountains. I was told that if you do not have the option to choose a more aligned IAF based on arrival direction (and that radar vectors are not available), then file to a VOR, intersection, or GPS fix that does provide a more direct arrival to the IAF and plan on jumping off the airway sooner to fly direct to that point. -- Peter Back to top BillJ Guest Posted: Tue May 08, 2007 2:42 pm    Post subject: Re: Aurora GPS RWY 17 Question Peter R. wrote: Quote: On 5/7/2007 1:48:08 PM, "Dennis Johnson" wrote: If you overflew UBG for 5 miles and then turned back to UBG, would that make the approach legal to fly? Lake Placid, NY, has these types of restrictions on their GPS approaches. http://www.myairplane.com/databases/approach/pdfs/09371RA.PDF Upon preparing for the flight to LKP a few years ago I had seen the note on the above chart and asked a more experienced IFR pilot about it. He told me that these types of notes are common when the required course direction change after the IAF is too great. TERPS doesn't want aircraft making that large a course change in the clouds, presumably in this case due to the nearby mountains. I was told that if you do not have the option to choose a more aligned IAF based on arrival direction (and that radar vectors are not available), then file to a VOR, intersection, or GPS fix that does provide a more direct arrival to the IAF and plan on jumping off the airway sooner to fly direct to that point. And sometimes they just get it wrong. http://myairplane.com/databases/approach/pdfs/05842R23.PDF shows such a restriction, but the NA from VOLAN is backwards. Should read approach NA from VOLAN eastbound, not westbound. 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