Density Altitude Descent Ground Effect 
Air Facts
SEPTEMBER 9, 2024
An incomplete summary description of FASF is whether the airplane made it out of ground effect. This descent used the same technique that (would have) had value in many of the NTSB accidents involving engine failure after takeoff. That phenomenon is best named Failure to Achieve Sustained Flight (FASF).
Chess In the Air
JUNE 24, 2022
Under normal circumstances Shmulik would have had sufficient altitude to delay the landing by several minutes: his glider’s minimum descent rate in still air was just 100 fpm. Even a more typical descent rate of 200 fpm would have allowed Shmulik to hold for about 5-7 minutes before he would have had to proceed with the landing.
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