Here you can find a list of keyboard shortcut definitions that can be assigned to action buttons.
 

You can use the following tool in order to test the input keys: http://help.adobe.com/en_US/flex/using/WS2db454920e96a9e51e63e3d11c0bf64a29-7fdb.html.

MODEL STRUCTURE

Keyboard Shortcuts
 Keyboard Shortcut