FlyerTalk Forums - View Single Post - 4 digital "chirps" before landing: what do they mean?
Thread: 4 digital "chirps" before landing: what do they mean?
View Single Post
Old Dec 25, 2017 | 7:40 pm
  #6  
jgreen1024
10 Countries Visited20 Countries Visited30 Countries Visited15 Years on Site
 
Join Date: Oct 2006
Location: IAD
Programs: UA 1K 2MM, Hilton Diamond
Posts: 565
It's the autopilot disconnect alert, when the pilot flying takes over manual control.
jgreen1024 is offline  
Reply