Fly with Magnar | What is SPD HLD for? | The pushbutton nobody is using | ATR mysteries part 1 @FlywithMagnar | Uploaded July 2022 | Updated October 2024, 2 hours ago.
ATR 42-600 and 72-600 have a great autopilot. But one pushbutton on the flight guidance control panel is never used. So, why is it even there?

Link:
- Powerplant part 1: youtu.be/behqG4Dw0Go

Attribution:
- ATR: youtube.com/watch?v=8f3fFm5OydM