PRIMUS
r
880 Digital Weather Radar System
A28- 1146- 102- 00
In- Flight Troubleshooting
7-8
Table 7- 3 describes the pilot messages.
Pilot MSG
Description
RADAR FAIL
The radar is currently inoperable and should not be
relied upon. It will need 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 may also cause ground spoking.
Have the RTA checked at the next opportunity.
TURB UNCAL
A problem has been detected with the turbulence
detection hardware. Assume turbulence display to be
inaccurate. Nonturbulence modes should be
functioning properly.
Have the RTA checked at the next opportunity.
SPOKING LIKELY A problem has been detected which may 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 may occur. This may be
due either to the RTA or the source of pitch and roll
information to the RTA.
NO AUTOTILT
No altitude information is available to make the
altitude compensated tilt calculation. Otherwise, the
unit may be operated as normal. Have system
(including altitude source) checked at the next
opportunity.
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 7- 3
Summary of Contents for Primus 880
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