Cessna 172N - Page 63

CESSNA
MODEL
172N
SECTION
4
NORMAL
PROCEDURES
buretor
heat.
Partial
heat
may increase
the carburetor
air temperature
to the
0o
to 2L"C
range,
where
icing is
critical
under eertain atmospheric
conditions.
HOT
WEATHER
OPER,ATION
Refer
to
the
general
warm
temperature starting
information
under
Starting
Engine
in this
section.
Avoid
prolonged
engine operation
on
the
ground.
NOISE
ABATEMENT
Increased emphasis
on
improving
the
quality
of
our
environment
requires
renewed effort on
the
part
of
all
pilots to
minimize
the effect
of
airplane noise on
the
public.
We, as
pilots,
can
demonstrate
our concern for environmental im-
provement,
by
application
of the
following suggested
procedures,
and
thereby
tend
bo
build
public
zupport
for aviation:
(1)
Pilots operating
aircraft under
VFR
over
outdoor
assemblies of
persons,
recreational
and
park
areas, and other noise-sensitive
areas
should
make
every effort
to fly not
less
tlwn 2,000 feet above
the
surface,
weather
permitting,
even though
flight
at
a lower
level
may
be
consistent
with
the
provisions
of
government
regulations.
(2)
During deprfure
from
or approach to
an airport,
climb
after
taleoff
and
descent
for
landing
should
be
made so
as
to avoid
pro-
longed
flight at low altihde near
noise-sensitive areas.
NOTE
The
above
recommended
procedures
do
not apply
where
they would
conflict with Air
Traffic
Control
clearances
or instmctions,
or where, in
the
pilotfs
judgement,
an
altifude
of
less
than
2,000
feet
is necessary for him
to
adequately
exercise
his
duty
to
see
and
avoid other air-
craft,
The certificated
noise
level
for
the
Model
172N at
2300
pounds
maxi-
mum
weight is
73.8 dB(A).
No determination
has
been
made by the
Federal
Aviation
Administration
that
the
noise
levels of
this airplane
are
or should
be
acceptable
or unacceptable
for
operation
at,
into,
or
out
of,
any
airport.
4-23/(4-24
blank)