In article . com,
" wrote:

The same for that L-1011 crash back in the early 70's that flew down to
the ground in the Everglades, when the crew accidentally disengaged the
autopilot, while trying to figure out why a light wasn't working.
You'd think there'd be a loud buzzer for at least a second.

The Cessna 182S that was in the flying club I am a member of has a
KAP-140 two-axis autopilot installed. When the autopilot is disengaged
it "whoops" very loudly.