SA 160
AIRCRAFTA I R C R A F T
Symphony
AIRCRAFT
3-19
WARNING !
SECTION 3
EMERGENCY PROCEDURES
Feb 25, 2005
Icing Checklist 3.5 n
Under certain circumstances, usually in cold weather, icing
conditions may prevail and ice can accumulate on external surfaces of
the aircraft. The occurrence and the manner of icing depends on the
air temperature, humidity, as well as other atmospherically condition
butalsoontheairspeedoftheaircraft.
At the first sign of icing conditions the area of icing should be left as
soonaspossible.
Icing has a very strong negative effect on the aerodynamic
characteristicsoftheaircraft. Stalling speed increases.
Continuedflightinicingconditionsisprohibited.
Achangeoftemperaturewilloccurwithachangeofaltitude.
The pitot heat reduces the chance of ice accumulation on the pitot
tube, which could cause wrong indications and failure of the static /
dynamicsystem.
The carburetor is especially at risk because of the rapid absorption of
heat from the air by vaporization of the fuel. To prevent carburetor
icing and an engine power loss, switch carburetor heat . Cabin
heatingandcabinventilationpreventsicingonthewindshield.
It is advisable to proceed toward the nearest airfield and wait for
better weather conditions.
With an ice accumulation on the wing leading edges of 5mm or more,
perform a landing with flaps up or in 20° position.
The landing approach speed should be higher depending upon
amountoftheaccumulation.
ON
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