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The new maintenance schedule affected about 85 of the 165 Q400 aircraft worldwide. Some operators found that spare parts for this unexpected actuator replacement program were not available, grounding their aircraft indefinitely. [17] Investigators detected corrosion inside actuators on 25 of 27 aircraft they checked.
How it works "The MultiAir system is elegantly simple. An electrohydraulic actuator, a high-response, electronically activated solenoid—controls the pressure applied to hydraulic fluid (engine oil drawn from the sump) that fills a thin passageway that connects the intake valves and the camshaft.
The result is an engine that fails to maintain idle RPM and frequently stalls. A jammed actuator may be freed simply by cleaning it. However an actuator that has stopped working due to a fault in its servomotor will need replacement. Air leaks in either the stepper housing or pipes will cause elevated idle RPM.
In modern engines, valve spring failure at high RPM has been mostly remedied. The main benefit of the desmodromic system is the prevention of valve float at high rpm. In traditional spring-valve actuation, as engine speed increases, the inertia of the valve will eventually overcome the spring's ability to close it completely before the piston ...
A Florida mother was arrested for saying the phrase “Delay, Deny, Depose” — in an apparent reference to the targeted UnitedHealthcare CEO killing — on a call to a health insurance company ...
Electro-hydraulic actuators (EHAs), replace hydraulic systems with self-contained actuators operated solely by electrical power. EHAs eliminate the need for separate hydraulic pumps and tubing, because they include their own pump, [1] simplifying system architectures and improving safety and reliability. This technology originally was developed ...
Donald Trump’s siding with Elon Musk over visas for high-tech workers is the most significant example yet of the president-elect favoring powerful elements in his new MAGA coalition over his ...
The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator. Another valve actuator is visible in the background, with windows to indicate the valve position. A valve actuator is the mechanism for opening and closing a valve. Manually ...
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