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Not At Night

One of the first things instrument pilots learn during their training to fly approaches is reading the fine print, the various notes that may accompany a published procedure. Its a classic case of the large print holding great promise while the small print dashes any lingering hopes. Perhaps most ubiquitous is the NoPT admonition that a procedure turn is not authorized when flying to the final approach fix on certain segments.

Gemini Sparkle

Key Takeaways:

  • The increasing number of instrument approaches "Not Authorized (NA) at night" is primarily due to obstacles like trees penetrating the approach's visual area 20:1 slope.
  • FAA policy regarding these slope penetrations has evolved over time, with periods of varying enforcement and ongoing interim solutions involving risk assessment.
  • The FAA faces limitations in forcing the removal of off-airport obstacles, often resorting to issuing "NA at night" notices or other workarounds.
  • Pilots flying into affected airports should plan for daytime arrivals, educate themselves on local obstacles, and under no circumstances attempt unsafe, unauthorized night approaches.
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One of the first things instrument pilots learn during their training to fly approaches is reading the fine print, the various notes that may accompany a published procedure. It’s a classic case of the large print holding great promise while the small print dashes any lingering hopes. Perhaps most ubiquitous is the NoPT admonition that a procedure turn is not authorized when flying to the final approach fix on certain segments.

One that’s been tripping up a lot of operators lately, however, is the seeming proliferation of notes advising an approach procedure is not authorized at night. The approach is legal during the day, the runway has lights, so what’s the problem? Did the airport not pay their electric bill? Not exactly. In fact, finding an approach NA at night is becoming increasingly too common. What’s going on?

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