Second AI for TC?

[Roger Long]

I see that the FAA has issued an AC

http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular
..nsf/ACNumber/26BA6B66CF38D2BC86256D560054CE8A?OpenDocument

which permits installing a second AI instead of a Turn Coordinator as long
as it is powered differently than the primary one.

This would leave you without a ball though. I can't remember looking at the
TC but I wouldn't want to fly without the ball.

Does anyone make an AI with a ball or would you have to bolt an aftermarket
ball unit to the panel?
--
Roger Long

[Newps]

Roger Long wrote:
> I see that the FAA has issued an AC
>
> http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgAdvisoryCircular
> .nsf/ACNumber/26BA6B66CF38D2BC86256D560054CE8A?OpenDocument
>
> which permits installing a second AI instead of a Turn Coordinator as long
> as it is powered differently than the primary one.
>
> This would leave you without a ball though. I can't remember looking at the
> TC but I wouldn't want to fly without the ball.

You have to install the ball. You just need to read further down the AC.