CFI Instrument Practical Test Standards, FAA-S-8081-9B, June 2001

II. Technical Subject Areas

A. Aircraft Flight Instruments and Navigation Equipment

3. Anti-ice/deicing and weather detection equipment and their operating characteristics
b. Propeller
1) Modified airfoil subject to icing induced loss of effectiveness
2) Cessna TR-182 propeller anti-ice system
a) Operated by rocker-type PROP A/ICE switch on upper left panel
b) Current is cycled by an anti-ice timer to electrically heated elements in anti-icing boots on leading edges of each prop blade
c) Check operation by monitoring PROP ANTI-ICE AMP ammeter on upper right panel
d) System protected by "push-to-reset" type 20-amp PROP A/ICE circuit breaker (3-blade prop)
e) Limitations - Intentional flight into know icing conditions prohibited
f) If unexpected icing
i) Check Master ON
ii) PROP A/ICE switch ON
iii) Prop anti-ice ammeter MONITOR in green arc, 14-18 amps (3-blade prop) continuously except pointer should "flick" momentarily every 20 seconds as timer switches element sets
iv) Monitor that airplane ammeter maintains slight charge (if discharge indicated, limit ust of other electrical equipment)

g) Malfunction
i) PROP A/ICE ammeter out of green arc or pointer fails to "flick" approximately every 20 seconds
ii) Turn switch OFF (uneven anti-ice may cause prop imbalance and engine roughness)
h) For accurate magnetic compass readings, momentarily turn OFF pitot heat and propeller anti-ice

References:
Instrument Flying Handbook, FAA-H-8083-15, 1999
The Instrument Flight Manual, Sixth Edition William K. Kershner, 2002
AC20-113 Pilot Precautions and Procedures to be Taken in Preventing Aircraft Reciprocating Engine Induction System and Fuel System Icing Problems
AC91-51A Effect of Icing on Aircraft Control and Airplane Deice and Anti-Ice Systems
AC91-74 Pilot Guide: Flight in Icing Conditions

<- Flight/Nav Instruments
Front Page Top