DA20-C1 Flight Manual
Supplement 11
Doc # DA202-C1 April 06, 2010 Page S11 - 2
Revision 25 DOT Approved
1. GENERAL
Ice build up on the Pitot Static Probe can cause the airspeed, altimeter and vertical speed
indicators to display incorrect data. The “Pitot Heat” system provides protection against ice
build up on the Pitot Static Probe.
Due to the increased electrical load when the “Pitot Heat” system is operating, the ammeter
must be monitored. When engine power settings are below cruise power and/or combinations
of electrical system users result in a higher than normal power consumption, it may be
necessary to manage the electrical load by, turning off unnecessary electrical consumers.
CAUTION
CHECKING OPERATION BY TOUCHING THE PROBE AFTER
MOMENTARY APPLICATION OF POWER IS NOT SUFFICIENT
IN DETERMINING PROPER SYSTEM OPERATION. THE
GREEN PITOT CURRENT MONITOR LIGHT MUST ILLUMINATE
DURING THE TEST TO CONFIRM PROPER HEATING.
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