[SOLVED] CHECK APT OAT

[dlrk]

What does "CHECK APT OAT" mean on the FMS? I've entered the OAT in the takeoff and perf pages.

Edited January 8, 2022 by SneakyDanish

[Kikis0507]

Hi,

this can relate with the “Temperature compensation” setting in the FMS. If you turn this OFF the message will disappear. See the attached screenshot from the Collins FMS manual on this subject. 
 

regards

frits 

Edited January 8, 2022 by Kikis0507

[dlrk]

But I did enter a valid temperature

[Kikis0507]

That is correct. But if Temperature Compensation is “ON”, the message will keep appearing. So you need to enter the valid Temp and then have the setting above to “OFF”. Hope this helps. This will most likely only appear in much colder environments 

[dlrk]

No, look at the manual you posted "This message is cleared when the temperature compensation is turned off...or when a valid temperature for the airport is entered"

[dlrk]

Solved on discord, the OAT needs to be entered on the TEMP COMP page on page 2 of the index

[Kikis0507]

great