I am having an issue with the upper ICAS. I loose the out flow valve indicators, diff press, duct press and landing alt info at the bottom of the LCD. When The plane powers up, its there, and sometimes stays longer

than other times. There was only one flight that these items stayed the entire flight. When they do disappear, they will only come back when I select the Air condition page.

Anyone having this problem?

 

regards

 

Doug

This is correct behaviour. It's supposed to only show when the air page is selected or if the landing altitude isn't set yet among about 12 other abnormal situations (which is why it shows during the preflight until you enter the flight plan). Page 2.10.14 in Vol. 2 of the FCOM has the full list of situations this information will appear.