Вот, цитата из мануала
There is another position at the other end of the throttle
travel that stops the throttle from moving below the idle setting to the cut-off
setting (which avoids accidental shutdowns). In the F-16, a small lever must
be engaged to move the throttle below idle and shut down the engine: Use
the throttle idle detent [ALT-i] to cut-off the fuel flow to the engine.