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Posted (edited)

The CNI page line 2 has four boxes to display information: OFF/GRD/BUP/(blank)/(HQ), DFLT/(blank), direction, speed. The first two info boxes refer to the radio system. The second two are calculated wind data.

Normally the MMC calculates the wind data based on the difference between CADC airspeed and INS motion. On the ground this calculation cannot be done. The word "DFLT" (default) has nothing to do with the wind display though and shouldn't show up as it does.

"DFLT" shows up when the UFC connection is lost and the UFC reverts to default radio settings.

Edited by Frederf
Posted
10 hours ago, Frederf said:

The CNI page line 2 has four boxes to display information: OFF/GRD/BUP/(blank)/(HQ), DFLT/(blank), direction, speed. The first two info boxes refer to the radio system. The second two are calculated wind data.

Normally the MMC calculates the wind data based on the difference between CADC airspeed and INS motion. On the ground this calculation cannot be done. The word "DFLT" (default) has nothing to do with the wind display though and shouldn't show up as it does.

"DFLT" shows up when the UFC connection is lost and the UFC reverts to default radio settings.

 

Alright thanks for the explanation!

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