Piper ARCHER III Pilot Operating Handbook page 313

PA-28-181, ARCHER III
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3.5 EMERGENCY PROCEDURES CHECK LIST (continued)
3.5j Carburetor Icing
CARB HEAT ......................................................................................... ON
MDCTURE .................................................................. Adjust for Maximum
Under certain moist atmospheric conditions at temperatures of -5
°
20 C, it is possible for ice to form in the induction system. This is due to the
high air velocity through the carburetor venturi and the absorption of heat
from this air by vaporization of the fuel. To avoid this, carburetor preheat
is provided to replace the heat lost by vaporization. Carburetor heat should
be full on when carburetor ice is encountered .
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ISSUED: December 22, 2017
Carburetor Icing
SECTION 9
SUPPLEMENT 6
Smoothness
C to
°
REPORT: VB-2749
5 of22 9-35