NAVIGATION AND
COMMUNICATION
AIRPLANE
OPERATIONS
MANUAL
2-18-45
Page
8
Code
01
REVISION 38
AOM-145/1114
FORCED STANDBY MODE (FSBY)
The FSBY is an automatic, non-selectable radar mode, that forces the
radar into standby when the airplane is on the ground (weight-on-
wheels logic) regardless of the selected active radar mode. This is a
safety feature that inhibits the transmitter on the ground to eliminate
X-band microwave radiation hazards. In FSBY mode, the transmitter
and the antenna scan are both inhibited, memory is erased and a
FSBY label is displayed on the PFDs’ and MFDs’ radar mode field.
The forced standby mode may be overridden on the ground by
pushing the STAB button 4 times in 3 seconds.
CAUTION:
IF FSBY MODE IS OVERRIDEN ON THE GROUND AND
ANY RADAR ACTIVE MODE IS SELECTED, THE
TRANSMITTER IS TURNED ON. THE RADAR MUST
NOT BE OPERATED UNDER THIS CONDITION WHILE
REFUELING, NEAR FUEL SPILLS OR PEOPLE.
WEATHER DETECTION MODE (WX)
The WX mode is used to detect areas of severe weather. This will
allow the pilots to avoid dangerous weather conditions and possible
turbulence areas. WX may be used on the ground, often prior to
takeoff, in order to monitor the weather in the immediate vicinity. In this
case, the forced standby mode may be overridden.
In WX Mode, the weather radar system is fully operational and all
internal parameters are set for enroute weather detection. A WX label
is displayed on the PFDs’ and MFDs’ radar mode field.
The levels and colors associated with the storm category are as
follows:
LEVEL COLOR RAINFALL CATEGORY
4 Magenta Extreme/Intense
3 Red Very Strong/Strong
2 Amber Moderate
1 Green Moderate/Weak
0 Black Weak
To Next Page
