AGL Federal Aviation Regulations Turbulence 
Pilot Institute
MARCH 6, 2025
AGL Above Ground Level AGL is simply a way to tell the basis from which any given height or altitude is measured. Simply put, 400 feet AGL means that the 400 feet is measured from the underlying ground surface above the specific airspace. These are all the rules that govern aviation activities in the United States.
AV Web
APRIL 15, 2025
Seems the accident helicopter was the subject of a FAA Special Federal Aviation Regulation (SFAR), which specified academic, flight training, qualification, and currency requirements for pilots acting as pilot-in-command. Seconds later, the main rotor disc severed the tailboom. Again, post-accident formalities proved awkward.
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