Nav #2 CDI Requirements

Groundpounder

Groundpounder

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Emerson Bigguns
Since we are not required to even have a 2nd nav source for IFR flight, are there any requirements on what we have for a nav #2 CDI?

Here is why I am asking. Daydreaming about our next panel upgrade, which is going to add more glass. Nav #2 right now is a KX-165 paired with a generic BK CDI with glideslope. We have a G5 HSI that is paired with our Garmin 530, and a KI-256 ADI that drives our KFC-200. I was thinking about an Aspen Max 1000 as our PFD, and use the G5 as a backup ADI and nav #2 CDI. That way we can eliminate the current CDI, and at some point replace the KX-165 with a new Garmin nav/com.
 
The Garmin G5 system cannot be connected to a King radio, they are not compatible in any way.
 
bnt83 said:
The Garmin G5 system cannot be connected to a King radio, they are not compatible in any way.
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yes they can, they both can be connected to the same power and ground. :)
the company that gets the box to do that certified will do quite well i think.
 
OK.

Well back to the original subject, are there any specific requirements for displaying nav data from the #2 nav radio?
 
Groundpounder said:
OK.

Well back to the original subject, are there any specific requirements for displaying nav data from the #2 nav radio?
Click to expand...
Well, if you use it, it needs to display the data on some sort of OBS or HSI. With glass, that's usually going to be a CDI-select switch, although you can certainly keep your #2 OBS. To show both at the same time, one will be a bearing pointer (like an RMI). Even the G1000 is set up that way and the G5 can be configured that way.
 
I know the practical needs for the #2, my question is about the regulations.

Lets take the GI-275 as an example. From what I can see, if it is going to be your #1 CDI, the mode cannot be changed from it acting as a CDI. But what if it is #2? Can I change modes in it to lets say the moving map, or an ADI? If I a G5 could talk to my KX-165, would it have to be in HSI mode the entire time?
 
Groundpounder said:
I know the practical needs for the #2, my question is about the regulations.

Lets take the GI-275 as an example. From what I can see, if it is going to be your #1 CDI, the mode cannot be changed from it acting as a CDI. But what if it is #2? Can I change modes in it to lets say the moving map, or an ADI? If I a G5 could talk to my KX-165, would it have to be in HSI mode the entire time?
Click to expand...
I was referring to the formal requirements whether or not technically in the regulations - most of the specific requirements are not in the FAR itself but in ACs and Orders and other quasi-regulatory documents.

@MauleSkinner is correct. You can research the term in a number of FAA documents, but there is a general requirement that a navigational display be in the "primary field of view. " Plus, you need to look at the AFMS for the nav equipment. It may tell you what you need.
 
Groundpounder said:
I know the practical needs for the #2, my question is about the regulations.

Lets take the GI-275 as an example. From what I can see, if it is going to be your #1 CDI, the mode cannot be changed from it acting as a CDI. But what if it is #2? Can I change modes in it to lets say the moving map, or an ADI? If I a G5 could talk to my KX-165, would it have to be in HSI mode the entire time?
Click to expand...

It woulD be helpful if Garmin published (public) STC installation limitations for the GI-275 rather than it being dealer privileged data. I'm pretty sure the GI-275 can display a non-Garmin radio, I think it is approved as an HSI and both navigators can be wired directly to it without an additional CDI.

Also, the HSI can act as a backup ADI depending on aircraft class i think.
 
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