Hi guys, I have a couple of probably dumb questions but, I haven't been able to find a definitive answer on my own so I'm going to ask them anyway.

I'd like to put an IFD540 or IFD550 in my plane, which already has an S-Tec 50 and an older GPSS.  Can I run the S-Tec 50 directly from the IFD and eliminate the current GPSS or will I need to keep it?

Next question, can any A&P do the install or does it need to be someone that is Avidyne certified? 

I appreciate the help, please don't be too rough on me, I promise I made an effort to answer these questions on my own.  Absent an installation manual, I just haven't been able to come up with the answers.  Which actually brings up one last question, is it possible to get a PDF copy of the installation manual to study before making a final decision?

You will need GPSS from somewhere, if you want to run the STec 50 with a GPS track. That can be the discrete box you have, an ASPEN which has a GPSS capability built-in, other sources as well.

In contrast the STec 55x does have a GPSS built-in.

Avidyne used to provide install manuals to the general public, but these are now restricted to shops only.

* Orest

Thanks for the information. 

By shops only, does that mean authorized dealers only or only people with an A&P?

Don't know for sure, but I expect it is certified dealers only.

* Orest