Alternate Static Source Valve
An Alternate Static Source Valve is a valve within the aircraft’s static air system that supplies reference air pressure to various instruments, including the altimeter, airspeed indicator, and vertical speed indicator. This valve is typically used as a backup option when the primary source of static pressure becomes obstructed or ineffective due to problems such as ice buildup, clogging, or other blockages.
In situations where the normal static pickup becomes clogged, the Alternate Static Source Valve can be activated by the pilot to allow air to flow from an alternative source. This alternate source of static pressure is typically located in a different part of the aircraft and is intended to provide accurate readings despite any obstruction or blockages in the primary static air system.
Activation of the Alternate Static Source Valve typically involves the pilot pulling a knob or flipping a switch to redirect the flow of air to the alternate source. This allows the affected instruments to continue to function properly and provide accurate information to the pilot, ensuring safe and reliable operation of the aircraft.
Overall, the Alternate Static Source Valve is an important backup system that provides redundancy and reliability in the aircraft’s static air system, ensuring safe and effective operation in all types of conditions and situations.
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