Alternate Static Source Cessna 172. 20131421 Cessna Alternate Static Source Valve On airplanes with an autopilot, there is a tube that connects the autopilot to a static port on the left side of the airplane at FS 117.25 Your aircraft's documentation may provide information that should be followed in case the alternate static source is used.
C172 windows are fogging up AirFoilLabs Forum from forums.x-plane.org
I could not find the thing during pre-flight Saturday and forgot to ask the FBO about it A new airworthiness directive from the FAA applies to certain Cessna 172, 175, 177, 180, 182, 185, 188, 206, 207, 208, 210, 303, 336, and 337 series airplanes
C172 windows are fogging up AirFoilLabs Forum
Has anyone installed one? Are parts hard to find? Thanks If the alternate source ports inside the airplane, where static pressure is usually lower than outside, selection may result in the following erroneous instrument indications: The altimeter reads higher than normal. Has anyone installed one? Are parts hard to find? Thanks
S21161 (Use 201314210) Cessna 172L Alternate Static Air Source Valve. Is (was) the alternate static source not standard? I can't find the plumbing, bracket, placard, etc In other words, they designed the normal pitot-static system to account for Bernoulli's Principle and keep the static readings accurate.
201314213 Cessna Alternate Static Source Valve (201314213). Look at this excerpt from a Cessna 172 PoH and you'll see there's very significant differences, especially with the windows open at low speeds. If the alternate source ports inside the airplane, where static pressure is usually lower than outside, selection may result in the following erroneous instrument indications: The altimeter reads higher than normal.