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Download Sharp R-360ES Specifications
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Section 7 Airplane Description Cirrus Design SR20 Suction Gauge The suction gauge, located on the far right side of the instrument panel, is calibrated in inches of Mercury (Hg). The gauge indicates suction available for operation of the attitude and directional gyros. The desired suction range is 4.5 to 5.4 inches of Hg. A suction reading out of this range may indicate a system malfunction or improper adjustment. The attitude and directional indicators should not be considered reliable when the suction gauge indicates out of range. • Note • The attitude GYRO flag will drop if the attitude indicator is not receiving adequate vacuum for operation. Vacuum Warning Light Illumination of the red VACUUM warning light in the annunciator panel indicates failure of the engine driven vacuum pump or that the airplane's engine is not operating. A vacuum switch in the vacuum line between the engine-driven vacuum pump and the vacuum manifold illuminates the VACUUM warning light on low vacuum in the line. In addition to illuminating the VACUUM warning light, the switch also trips a relay energizing the back-up electric vacuum pump. This condition exists whenever the BAT Master switch is on and the engine is not operating (such as before start) or in the event the engine-driven vacuum pump fails. The VACUUM warning light operates on 28 VDC supplied through the 2-amp ANNUNC PWR circuit breaker on the Essential Bus. Aux Vac Caution Light Illumination of the amber AUX VAC caution light in the annunciator panel indicates that the electric (back-up) vacuum pump is supplying vacuum. A vacuum switch in the vacuum line between the electric vacuum pump and the vacuum manifold illuminates the light on rising vacuum in the line. Normally, the light will be illuminated whenever electrical power is on the airplane and the engine-driven vacuum pump is not operating. The AUX VAC caution light operates on 28 VDC supplied through the 2-amp ANNUNC PWR circuit breaker on the Essential Bus. 7-64 P/N 13999-002 Info Manual September 2011
