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Thread: A320 preselecting QNH
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Old 23rd December 2021 | 15:43
  #15 (permalink)  
FlightDetent

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From: Commuting not home
TCAS should work with XPDR mode C altitude.
This should be hardwired to STD.
Remember, there is only one static pressure. Changing the QNH is calibrating the scale on the altimeter, not changing the source pressure itself.

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