IFD500 Series Pilot Guide
General 7-11
The IFD cannot compute a navigation solution. IFD
operation will be degraded (e.g. no map, no FMS guidance,
etc.) Transition to alternative navigation sources.
No communication with radar sensor
No data has been received from the sensor for at least 2
seconds.
The data stream from the radar contains information that
should not be used.
Sensor mode is <rep>. Selected mode is
<sel>
The selected mode <sel> does not match the reported
mode <rep>.
Radar fault code: <codes>
The sensor is reporting the fault codes that are shown.
Radar: Heavy Echoes Ahead
Generated when a number of red and/or magenta echoes
are present within the area ±22° off the nose of the aircraft
at the current displayed radar range.