NAVIGATION AND
COMMUNICATION
AIRPLANE
OPERATIONS
MANUAL
2-18-45
Page
6
Code
01
REVISION 38
AOM-145/1114
RADAR WARM UP PERIOD
When power is first applied to the radar, a period of 40 to 100 seconds
is required to allow its magnetron to warm up. The radar displays the
WAIT message on the PFDs’ and MFDs’ radar mode field and does
not transmit or perform an antenna scan. After the completion of
warm-up period, the radar automatically become operational in the
selected mode or goes to forced standby (FSBY) if the airplane is on
the ground.
GROUND OPERATION PRECAUTIONS
If the radar system is to be operated in any mode other than standby
or forced standby while the airplane is on the ground, the following
precautions should be taken:
-
Direct nose of airplane so that antenna scan sector is free of large
metallic objects such as hangars or other airplanes for a distance of
30 meters (100 feet).The antenna must be tilted fully upwards.
-
Avoid using the weather radar during airplane refueling or within 30
meters (100 feet) of any other airplane undergoing refueling
operations.
-
Avoid using the weather radar if personnel are standing too close to
the 270° forward sector of airplane.
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