i can give you :
Airbreak ON if you hold the botton, airbreak OFF if you release the button
also added AntiSkid/nws
{down = iCommandPlaneAirBrakeOn,up = iCommandPlaneAirBrakeOff , name = _('Airbrake ON else OFF'), category = _('shortcuts')},
{down = fcs_commands.Switch_ANTISKID, up = fcs_commands.Switch_ANTISKID,cockpit_device_id=devices.FLIGHTCONTROLS,value_down=0.0,value_up=0.5,name='Anti-Skid',category='shortcuts'},