Federal Aviation Regulations Stability Thrust 
Flying Magazine
JULY 26, 2025
Certifying Powered-Lift The AC defines powered-lift as heavier-than-air aircraft that use “engine-driven lift devices” or engine thrust for vertical takeoff and landing and low-speed flight. The new AC is intended to clarify the certification process. For lift during horizontal flight, they use rigid airfoils such as wings.
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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