It was discovered that an undercarriage selector valve had failed.

He set the fuel selector valves to "main," the induction air system to "filtered."

The Argonaut has eight fuel tanks connected in pairs by selector valves.

After the selector valve there usually is a gascolator - a fuel filter that can be drained.

This was controlled in a rather interesting (for want of a better word) manner by a series of selector valves and a control button.

His newly purchased experimental Rutan had an unusual fuel selector valve handle configuration.

The fuel delivery system has also been modified from the original design, placing the fuel selector valve closer to the pilot.

In some aircraft, the shut-off function is a different valve located after the fuel selector valve.

Denver told the mechanic that he would use the autopilot inflight, if necessary, to hold the airplane level while he turned the fuel selector valve.

Requirements and test methods for high and low pressure selector valves and their actuators for CO2 systems.

Dr. Frise also described a "selector valve," which is a device that directs the flow of fluids through one of two or more possible outlets.

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Selector valve with six air positions: Filter, Back Wash, Rinse, Recirculate, Empty and Close.

It was found that if the selector valves in the cross-feed system were a few degrees off the normal "off" setting, fuel could inadvertently bleed through the valves.

The standard setup is a HPLC pump, degasser, manual injection valve and a channel selector valve which chooses one channel, the other or both.

BACK Cooling and Fuel Radiator, fan and clutch, engine fan motor, fuel tank, fuel lines and fuel tank selector valve.

NTSB investigators' post-accident investigation showed that given the positioning of the fuel selector valves, switching the craft's fuel tanks required a pilot to turn his body 90 degrees to reach the valve.

The most likely cause of the engine stoppage was stiffness of the fuel selector valve causing it to be in an intermediate position, reducing fuel flow to a level too low to sustain continuous engine operation.

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If the erroneous command persisted for more than a predetermined time, differential pressure sensing activated a selector valve to isolate and remove the defective servovalve hydraulic pressure, permitting the remaining channels and servovalves to control the actuator ram spool.

Contributing factors in the crash were other pilot errors, a design that led to an overly optimistic pre-flight fuel-check estimate, a known defective (very hard to turn) fuel valve, and non-standard placement of the fuel selector valve by the kit plane's builder, at variance with Burt Rutan's specs.

The NTSB believes that he inadvertently pushed on his right rudder pedal while twisting to the left in his seat as he struggled to operate the fuel selector valve, which on his aircraft had been moved by a previous owner to a position where it could more easily be reached from the passenger seat.