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From TAAs to Terrain

Gemini Sparkle

Key Takeaways:

  • Flying into mountainous areas like the Blue Ridge Mountains (e.g., Ashe County Airport) requires extensive pre-flight planning due to significant terrain, high obstacles, and the need for meticulous missed approach procedures.
  • The article details RNAV approach specificities, including LP approaches (offering lower minimums with WAAS), Terminal Arrival Areas (TAAs) for operational altitudes and obstacle clearance, and the proper execution of Hold-in-Lieu-of-Procedure-Turns (HILPTs).
  • It clarifies how to identify "mountainous areas" officially and their implications for increased obstacle clearance requirements (2000 ft) in such regions, as opposed to non-mountainous areas.
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When thinking about mountain airp, states like Wyoming and Colorado come to mind. But there are plenty of mountainous destinations outside the Rockies. Head 1400 miles southeast, where the Blue Ridge Mountains offer breathtaking landscapes and lots to do in the great outdoors. While on a much smaller scale than out West, these landforms do have enough topography to require some extra planning. Oh, and bring a good GPS.

Cool, an LP IAP

Ashe County Airport (KGEV) near Jefferson is a great destination nestled in western North Carolina. Runway 10/28 sits at an elevation of 3178 feet. That’s the first cue we’re dealing with significant terrain. The second is that there are no approaches to Runway 10. Runway 28 has both an RNAV and LOC approach and they both offer circling, but with southwest winds and the hills it’s probably best to take the straight in.

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