Cessna 172N - Page 143

CESSNA
MODEL
172N
SECTION 7
AIRPLANE
&
SYSTEMS DESCRIPTIONS
STATIC
DISCHAR,GERS
If
frequent
IFR,
flights
are
planned,
installation
of
wick-type
static
dischargers
is
recommended
to improve radio
conununications
during
flight
through
dust or various forms
of
precipitation
(rain,
snow
or
ice
crystals).
Under these conditions, the
build-up
and discharge
of static
electricity
from
the trailing edges
of the
wings,
rudder,
elevator,
pro-
peller
tips
and radio antennas can
result in loss
of
usable
radio
signals
on all communications
and navigation
radio
equipment.
Usually the
ADF is
first
to
be
affected
and VHF
communication
eguipment
is the
Iast to
be
affected.
Instaltation
of
static
dischargers reduces
interference
from
precipi-
tation
static,
but it is
possible
to
encounter
severe
precipitation
static
conditions
which
might
cause
the loss
of radlo
siglrls, even with
static
dischargers
installed. Whenever
possible,
avoid
Fnown
severe
precipi-
tation
areas
to
prevent
loss of dependable
radio-signa1s.
If
avoidance
is
impractical,
minimize
airspeed and
anticipate temporary
loss of radio
signals while
in these areas.
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