Weather Radar; Wu-660 Weather Radar Control Panel (Figure 5-20) - BOMBARDIER LEARJET 40 Pilot's Manual

WEATHER RADAR

The Primus 660 is the standard radar installed in the Learjet 40. It is an
X-band radar system designed for weather detection and analysis. The
radar can also be used for ground mapping. The WU-660 is an integrat-
ed unit which incorporates the receiver, transmitter and antenna (RTA)
into a single unit, located in the nose of the aircraft. The only remaining
radar component is the cockpit control panel which is mounted on the
center pedestal. The antenna is a 12-inch flat plate that is stabilized with
inputs from the #1 AHRS. Weather patterns can be displayed on both
PFDs, on the ARC or MAP format, and on the MFD MAP format. The
radar generates high-level RF pulses and should be operated with cau-
tion while on the ground. When operating on the ground, position the
nose of the airplane so that the antenna scan sector is free of large me-
tallic objects such as hangers or other aircraft for a distance of at least
100 feet.
WU-660 WEATHER RADAR CONTROL PANEL
The weather radar is controlled from the WC-660 weather radar con-
troller, Figure 5-20. WX is selected for display on the PFDs by selecting
the WX button on the display controller, the HSI automatically switches
to the ARC mode. WX is selected for display on the MFD MAP by de-
pressing the WX bezel button on the MFD main menu.
A six-position rotary switch is provided on the radar control panel for
selecting the different radar modes. They are:
• OFF — removes electrical power from the system.
• SBY (standby) — in this position the RTA is powered up but
does not radiate any RF energy nor does the antenna scan.
PM-132A
Figure 5-20
Pilot's Manual
+
5-77