If you are not getting any Master Warning or Master Caution alerts, please ensure the MWS test and ground operation push/pull switch on the MWS Control Panel is in the middle reset position, with the red light extinguished. If the red light is illuminated, this indicates that the switch is in the GND OP position and all MWS audible and visual alerts will be inhibited (except audible warnings for the fire bell and take-off configuration warning horn).