Cessna SkyHawk SP 172S NAV III 2005 Pilot Operating Handbook page 161

SECTION 4
NORMAL PROCEDURES
HOT WEATHER OPERATION
CESSNA
MODEL 172S NAV III
Refer to the general warm temperature starting information under
Starting Engine in this section. Avoid prolonged engine operation o n ' l
the ground.
NOISE CHARACTERISTICS AND NOISE
REDUCTION
The certificated noise level for the Model 172S at 2550 pounds
maximum weight is 75.1 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.
The following procedures are suggested to minimize the effect of
airplane noise on the public:
' 1
1. Pilots operating airplanes under VFR over outdoor assemblies
of persons, recreational and park areas, and other noise
sensitive areas should make every effort to fly not less than
2000 feet above the surface, weather permitting, even though
flight at a lower level may be consistent with the provisions of
govemment regulations.
2. During departure from or approach to an airport, climb after
takeoff and descent for landing should be made so as to avoid
prolonged flight at low altitude near noise sensitive areas.
NOTE
The above recommended procedures do not apply
where they would conflict with Air Traffic Control
clearances or instructions, or where, in the pilot's
judgment, an altitude of less than 2000 feet is
necessary to adequately exercise the dUty to see
and avoid other airplanes.
4-52 U.S.
172SPHAUS-OO