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PRIMUS
R
660 Digital Weather Radar System
A28–1146–111
REV 2
In–Flight Troubleshooting
8-8
Table 8–3 describes the pilot messages.
Pilot MSG Description
RADAR FAIL The radar is currently inoperable and should not be
relied upon. It needs to be replaced or repaired at the
next opportunity.
RADAR CAUTION A failure has been detected that can compromise the
calibration accuracy of the radar. Information from the
radar should be used only for advisory purposes such
as ground mapping for navigation.
PICTURE UNCAL The radar functions are ok, but receiver calibration is
degraded. Color level calibration should be assumed
to be incorrect.
Have the RTA checked at the next opportunity.
TILT UNCAL An error in the antenna position system has been
detected. The displayed tilt angle setting could be
incorrect. This can also cause ground spoking.
Have the RTA checked at the next opportunity.
SPOKING LIKELY A problem has been detected that can cause spoking
to occur.
Have the system checked at the next opportunity.
STAB UNCAL An error in the antenna positioning system has been
detected. Groundspoking, or excessive ground
returns during roll maneuvers can occur. This can be
due either to the RTA or the source of pitch and roll
information to the RTA.
SCAN SWITCH The SCAN SWITCH located on the RTA is off,
disabling the antenna scan. Check at the next
opportunity.
XMIT SWITCH The XMIT switch located on the RTA is off, disabling
the transmitter. Check at the next opportunity.
Pilot Messages
Table 8–3