You may be surprÂ­ised to discover that a carbon monoxide (CO) detector really isn't a complicated piece of equipment. Housed inside a plastic chamber approximately 3 inches (7.6 centimeters) in diameter are parts that work in unison to alert a househoÂ­ld when lethal gas is detected.
This type of noise is usually caused by malfunctioning valve lifters or an exhaust manifold leak. If the noise lasts for more than a minute and completely disappears or dimishes after the engine is warm, the most likely cause is an exhaust manifold leak.
The End Aircraft noise, like buffet noise is common and a safe vibration. Noise vibrations are caused by the rapid back and forth motion of a specific part of the plane. Noise vibrations are relativley harmless, and they usually do not have negative affects on the plane.