Ling Kei Jacky Ngai
Aviator
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Ling Kei Jacky Ngai posted an update 2 months ago
Sorry, just can not understand how a pitot tube leak will lead to an overread.
As the ASI is calculated by Total pressure (measure by pilot tube) – static pressure (measure by static tube).
Assuming a unpressurized airplane, with a reduced figure of total pressure, isn’t the outcome will always be a smaller figure?
Jonty1 Comment-
Hi Ling, that is correct. It should be “Underread”. Here is an extract from Aircraft General Knowledge by ATC (p. 160). Also an interesting stack exchange article here: https://aviation.stackexchange.com/questions/90388/what-would-be-the-asi-readings-incase-of-pitot-leakage. I will update that now 🙂
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