Originally Posted by
FahQ2
This is a scary button that should ONLY be used in “extreme” or “emergency” situations…. Or so I was told years ago in a grave and solemn tone after using it to clear some weather in the low 20’s climbing out of LAX.
Since then my cockpit prep consists of covering it up with a post-it note with his initial reaction “NO!”
During Captain OE the check airman has you push the Expedite button so that you see what it does - it's nothing scary.