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Section 7 – Airframe and Systems description
INSTRUMENT PANEL
4.2. ALTERNATE AIR
Alternate Air knob is located on the central pedestal; when the knob is fully pulled
outward from the instrument panel, injectors receive maximum hot air. During normal
operation, the knob is set in OFF position.
4.3. DEFROST AND CABIN HEAT
Two knobs, located on the lower side of the central pedestal, allow Defrost and Cabin
Heat function. The one marked as “Defrost and Cabin Heat” allows hot air to perform
windshield defrost and partially cabin heat.
The cabin heat control knob, when fully outward, allows cabin to receive maximum
hot air. When both cabin heat and defrost and cabin heat are pulled, air is partitioned.
Fig. 7-9. CENTRAL PEDESTAL
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