Courtesy Cirrus Aircraft and a pilot's operating handbook for the SR20, following are the FAA-approved procedures for resolving the two basic kinds of pitot-static
system blockages: a blocked pitot tube or a blocked static source, the latter of which is pictured above.
You either have pitot-static
failure (you're really descending) or AHRS failure (you're really pitched level).
The Evolution system's Achilles heel is pitot-static
Pappy guessed that ice had clogged the outside ports for the pitot-static
With my G600, a pitot-static
glitch, which in the good old days would have caused a barely-noticeable blip on my round VSI or ASI, now throws my ADC into re-compute mode and I lose my glass AI for about 10 seconds as the system crunches the bad data.
That means no mechanical pitot-static
and no spinning mass gyro.
My instruments held steady, so we concluded his pitot-static
system was icing over.
The current Aspen PFD has an Achilles' heel in the form of pitot-static
For homebuilders, MountainScope can integrate with some autopilots and take Dynon and Crossbow gyro info and also tie into a pitot-static
The 40-knot guideline most probably was based on the inherent limiting characteristic of antiquated pitot-static
, airspeed-sensing systems that are unreliable or erratic below 40 knots.
Perhaps if the crew of Aeroperu Flight 603 had a better grasp of the pitot-static
system and its various failure modes, their Boeing 757 may not have crashed because a maintenance worker had left some tape covering the static ports.
You don't know from the information given which one is wrong, but on a single pitot-static
system like the Bonanza, you've most likely forgotten to up date the standby altimeter setting.