So how does one manually extend the GS on an A320? The same lever as used to arm them? by Mad (flt) Scientist
The lever is used for SPEED BRAKE control, an in the air function only, as was mentioned by another poster, the lever does not move during landing, Airbus pilots don't associate this lever with GROUND SPOILERS, if the GROUND SPOILERS fail to deploy on landing, it's because of thrust lever position, moving the lever back for some kind of manual activation is not an option.