Beechcraft C-12C Operator And Technical Reference Manual page 543

SUBSYSTEM
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BUS
w. Miscellaneous Functions.
(1) Miscellaneous Functions. The FMS-800
also provides the following functions that are not
covered in the previous sections.
(a) Timers.
watch lap counters are available complete with time-
out annunciations.
Table 3C-102. System Failure Indications (Continued)
FAILURE INDICATION
Antenna Fault
Radio Fault
Equipment Fault
MIL-STD-1553 Terminal
Status
V/UHF Radio Subsystem
Status
MIL-STD-1553B Bus Status
Three independent stop-
POSSIBLE EFFECTS
V/UHF radio receive or transmit capability may be
inoperative or have impaired capability.
V/UHF radio may be inoperative or have impaired
capability.
V/UHF radio may be inoperative or have impaired
capability. Verify
degradation.
V/UHF radio may be unable to communicate on the
1553 bus.
V/UHF radio may be inoperative or have impaired
capability.
NGO-A: V/UHF radio is not responding on the A bus.
NGO-B: V/UHF radio is not responding on the B bus.
NGO-T: V/UHF radio is not responding on either
1553 bus.
(b) Model Aircraft.
inserts heading, altitude, wind, and true airspeed data
into the navigation equations in order to provide a flight
simulation capability.
(2) Timer Function.
pressing the TIMERS line select key on the Index 1
page. The three timers can be used independently to
display elapsed time (counting up to 23:59:59) or
countdown to 00:00:00. They can be stopped at any
time. Refer to Figure 3C-140 and Table 3C-103.
TM 1-1520-218-10
other faults for functional
The model aircraft
Access the timers by
3C-189