2-45
significant airspeed and altimeter errors will occur;
d.
with vents and windows closed, the airspeed indicator and altimeter may read up
to 5 MPH and 50 feet high, respectively. Opening the vents will reduce these
errors to near zero;
e.
with the windows open variations in readings can be as much as:
(1) 12 MPH and 50 feet low when near the stall; and
(2) 12 MPH and 100 feet high when in cruise.
f.
as little as ¼ inch of ice accumulation on the leading edges will significantly
increase the stall speed by as much as 20-30%;
g.
control may become increasingly sluggish and heavy feeling as ice accumulates;
and
h.
flaps should remain retracted. With severe ice accumulation on the horizontal tail,
the change in wing wake airflow with flap extension may result in loss of elevator
effectiveness.
Turbulence and Thunderstorms
73.
Flights into strong turbulence are discouraged. If strong turbulence is accidentally
encountered, set airspeed as close to manoeuvring speed as practical and fly a constant pitch
attitude. This technique combats the tendency to chase wildly fluctuating airspeeds and
altitudes caused by differential barometric pressures in the storm.
WARNING
Flights into thunderstorms are prohibited.
Cold Weather Operations
74.
Operating the Cessna 182 in cold weather involves greater than normal care of the
airframe if it is stored outside, and more concern with the strains that cold temperatures put on
the engine and propeller. Cold weather may also create additional hazards such as slippery
ramp / taxiway / runway surfaces, as well as the possibility of ice / snow accumulation on the
aircraft.
75.
When operating in cold weather, the following precautions shall be observed:
a.
the external check must ensure all contamination is carefully removed from the
airframe. Removal of snow and light frost may be accomplished using light
sweeping with a soft broom. More substantial accumulations may be removed
using de-ice fluid, if local de-icing services are available;
WARNING
Ensure that all surface contamination is removed prior
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