S
ECTION
4: N
ORMAL
P
ROCEDURES
C
IRRUS
D
ESIGN
N
OISE
C
HARACTERISTICS
/A
BATEMENT
SR20
4-28
P/N 11934-005
Noise Characteristics/Abatement
The certificated noise levels for the aircraft established in accordance with
CFR 36 Appendix G are:
No determination has been made by the Federal Aviation Administration
that the noise levels of this airplane are or should be acceptable or unaccept-
able for operation at, into, or out of, any airport. The above noise levels
were established at 3150 pounds takeoff weight and 2700 RPM.
Recently, increased emphasis on improving environmental quality requires
all pilots to minimize the effect of airplane noise on the general public. The
following suggested procedures minimize environmental noise when oper-
ating the aircraft.
• N
OTE
•
Do not follow these noise abatement procedures where they
conflict with Air Traffic Control clearances or instructions,
weather considerations, or wherever they would reduce safety.
1. When operating VFR over noise-sensitive areas, such as outdoor events,
parks, and recreational areas, fly not less than 2000 feet above the
surface even though flight at a lower level may be allowed.
2. For departure from or approach to an airport, avoid prolonged flight at
low altitude near noise-sensitive areas.
Fuel Conservation
Minimum fuel use at cruise will be achieved using the best economy power
setting described under cruise
.
Configuration
Actual
Maximum Allowable
Hartzell 3-blade Propeller,
HC-E3YR-1RF/F7392S-1, Metal
(Standard)
82.9 dB(A)
88.0 dB(A)
Hartzell 3-blade Propeller,
3C1-R919A1/76C03-2, Composite
(Optional)
81.7 dB(A)
88.0 dB(A)
Reissue A
