System Failures
10-3
10 System Failures
POWER DISTRIBUTION
Each IFD draws a total of 4.25 amps in nominal operation and up
to 8.25 amps under peak conditions. The keyboard draws a total
of 0.25 amps. This means a combined system of 2 IFDs and 1
Keyboard draws a nominal load of 8.75 amps and a peak load of
16.75 amps. The system is designed to operate without
degradation on a single power bus, including single functioning
alternator.
Each IFD is controlled by a pair of circuit breakers which need to
be pulled out to remove power to an IFD. As noted earlier, there
are no special reversionary modes or display formats. In many
cases, an electronic checklist exists that covers the various
system failures.
LOSS OF IFD 2-IFD CONFIGURATIONS
The simplest method of determining that a loss of one IFD has
occurred is a loss of both the bezel backlighting and the display
going black. The remaining IFD will also display some yellow
caution messages such as loss of cross-side ADAHRS and VHF.
If a PFD is lost, the MFD will automatically begin behaving as if it
is PFD. In other words, the ADI cannot be removed, no matter
what buttons are pressed. This transfer of behavior may take
several seconds following the loss of a PFD.
In a dual IFD system, loss of an IFD will have no effect on
DFC100 autopilot operations or your ability to command the
autopilot into any mode or target value.
Summary of Contents for Entegra
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