STATIC DISCHARGERS
To improve radio communications during IFR ights through dust or various
forms of precipitation, wick-type static dischargers are installed. Under these
conditions, the build-up and discharge of static electricity from the trailing
edges of the wings, rudder, elevator, propeller tips and radio antennas may
result in interrupted radio signals for all communication and navigation radio
equipment.
The static dischargers are installed to reduce interference from precipitation
static, but it is possible to encounter severe precipitation static conditions
which might cause the loss of radio signals, even with the static wicks
installed. Whenever possible, avoid areas of known severe precipitation to
prevent the loss of adequate radio signals. If avoidance is not practical, a
reduction of airspeed should help reduce the degree of precipitation static, but
expect some degradation of radio performance.
Static dischargers lose their effectiveness as they age, and should be
checked annually by a qualied maintenance technician. If testing equipment
is not available, it is recommended that the static wicks be replaced every
two years, especially if the aircraft is operated frequently in instrument
meteorological conditions. The static discharger wicks are designed to allow
them to unscrew from their mounting bases, facilitating ease of replacement.
COCKPIT USB PORTS
Two USB ports are installed in the cockpit on the aft side of the pedestal to
supply power to external devices (iPads, tablets, etc.) that support charging
via USB. Power is provided through the “Cabin Lights” circuit breaker.
This
circuit breaker must be engaged for the USB ports to operate.
The USB ports have several protective features built in that can affect use. If
the aircraft voltage supplied to the ports is reduced signicantly or if a high
amount of current is supplied, the ports will stop working until the voltage
or current returns to proper levels. The rate at which the external devices
are being charged by the ports can decrease if the temperature of the ports
becomes elevated. Once the temperature of the ports reduces to normal
limits, the rate of charge will return to normal.
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