Pilot’s Operating Handbook Section 7
EXTRA 500 Description of Airplane and Systems
empennage de-icing boots are inflated for approximately six (6)
seconds.
After completion of one inflation cycle, vacuum is applied to
deflate the boots and to maintain the boots in a non-inflated
configuration for approximately 48 seconds.
Thereafter to cycle starts again as described above. Thus a
complete cycle takes about 1 minute.
Note The green DEICE BOOTS advisory light only illuminates in
the few seconds, when the boots are actually inflated. Thus
the correct operation of the boots can only be checked
during this short illumination of the light.
7.26.b Heated Engine Air Inlet
The engine inlet can be heated for ice protection by means of
exhaust gases. The hot exhaust gases are directed from a ram
inlet within the LH exhaust stack into a shroud around the
intake duct and then back to into the RH exhaust stack. The ram
inlet in the LH stack can be opened and closed using the
INTAKE ANTI ICE push pull control located in the centre
console (
PULL TO HEAT). A switch located on the ram inlet
activates the green INTAKE HEAT operation indication light in
the annunciator panel. In addition to that a solenoid valve is
actuated to direct hot bleed air to the stator vanes in front of the
first compressor stage for heating.
Note Intake heat should be activated in all operation conditions
with visible moisture in the air and outside air temperatures
below 20 °C.
Note Activation of the engine air inlet will cause the TOT to
increase significantly with constant engine power output.
Therefore unnecessary activation of the intake heat should
be avoided in performance critical phases of flight.
26. January 2011 7-69
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