What is the 'WOW' switch?
Weight on Wheels - also known as 'squat switch'
The operation of the logo lights is dependant on engine type - on IAE a/c the logo lights only illuminate when the main gear is compressed or the slats are extended.
On CFM its just down to switch position.
Before anyone asks - no, I don't know the reason for the difference - the damn thing is French after all
