Beechcraft C-12C Operator And Technical Reference Manual page 282

TM 1-1510-218-10
A TX FLT is indicated if the Strut switch is
configured to be active and the aircraft is
on the ground.
Table 3A-3. Hard Failure Annunciations
ANNUNCIATION
TX FLT
429FLT
ANT FLT
IN FLT 6
Soft failures are those that can cause limited
system operation. Radar data will still be displayed,
but the flight crew should be aware that the display
does not necessarily represent the true weather. Soft
failures are typically
stabilization problems, or some similar problem. Refer
to Table 3A-4 for soft failure annunciations.
Table 3A-4. Soft Failure Annunciations
ANNUNCIATION
TX FLT
STAB LMT
STAB OFF
d. Weather Radar System Operation.
WARNING
Never operate the weather radar in the Wx,
WxA, LOG or GND MAP modes on the
ground when personnel are forward of the
aircraft wing and within 5 feet of the
aircraft nose. Failure to observe this
warning may result in permanent damage
to the eyes and other body organs of those
persons.
Never turn the radar on within 5 feet of
containers of flammable or explosive
material. Never operate radar during
fueling operations.
These procedures should be accomplished
prior to flight.
3A-40
NOTE
FAILURE
Transmitter failure
Loss of 429 bus data
Loss of antenna position
Loss of communication
between display and
ART
configuration problems,
FAILURE
Configuration module not
being read
Stab is exceeding ±30°
Alert that the scan is not
being stabilized
NOTE
(1) Accomplish
completely and exactly.
1. Function switch – TST.
2. TILT – UP 7.0, as shown on the
indicator display, upper right corner.
The test pattern will appear. See that the test
pattern conforms to the illustration. Refer to Figure
3A-23. The test pattern is sized to fit the 80 nm range
and can be scaled with the range buttons, and observe
the "update" action as a small ripple moves across the
display along the outer edge.
Figure 3A-23. Test Pattern
With the function switch in TST or SBY, taxi to a
clear area where there are no people, aircraft,
vehicles, or metallic buildings within approximately
100 yards.
3. Function switch – ON.
The indicator will automatically display in the Wx
mode and 80-nm range.
ground, will be displayed in green, yellow, red, or
magenta.
A 60-second warm-up time period is
required before the system will transmit.
Ž
4. RNG
40 nm as the maximum range.
5. WxA button – Press and observe the
magenta areas (if any) flash.
the following procedure
Any targets, weather or
NOTE
button – Press to display