Hot Weather Operation; Noise Characteristics And Noise Reduction - Cessna 172S NAV III Pilot Operating Handbook

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 on
the ground.
NOISE CHARACTERISTICS AND NOISE
REDUCTION
I
The certified takeoff noise level for the Model 172S at 2550 pounds
maximum weight is 75.1 dB(A) per 14CFR36 Appendix
G
(through
Amendment 36-21) and 78.2 dB (A) per ICAO Annex 16 Chapter 10
(through Amendment 4). No determination has been made 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. 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
government 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.
U.S. 172SPHAUS-03