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× Welcome to the CPL AGK question and answer forum. Please feel free to post your questions but more importantly also suggest answers for your forum colleagues. Bob himself or one of the other tutors will get to your question as soon as we can.

Quick question on Static source blockage

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zhezhizhang created the topic: Quick question on Static source blockage

If the static source is blocked, the instrument which will over read in a descent is
[a] altimeter.
airspeed indicator.
[c] vertical speed indicator.
[d] artificial horizon.

I understand ASI would over read, but what about altimeter. It will stuck at the original height, hence over read as well??
#1

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bobtait replied the topic: Quick question on Static source blockage

This question comes up occasionally.

It depends on your definition of 'over reading'. If the altimeter were over reading, it would be giving consistently higher readings than the actual altitude. So as altitude changed, the altimeter would be changing its indications but they would always be higher than the actual altitude.

If the static source was blocked, the altimeter reading would be fixed at the height at which the blockage occurred. It would simply be unserviceable. You couldn't call that over reading.
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