In article . com,
"Dico" wrote:

Hello,

Do I need certified engine monitors for a certified plane if I keep the
factory ones installed? I was asking this to someone at our airport
today and they thought that I could install, for example, one of those
fancy engine monitors you see in experimental airplanes, as long as I
had the certified counterparts that are required (egt, cht, fuel flow,
etc). Is this true?

I suppose it would depend on what you define as a "certified part".
The KN 64 DME is, last I knew, not a certified DME (i.e., not TSO'd).
But the installation of that DME in my airplane is approved with
an STC and appropriate 337. Does that make it a certified part?

My suggestion to talk to your A&P/IA.



Also, for non-essential flight gizmos like fuel flows (for example)...
why do I need a certified fuel flow compared to an non-certified one?

Who said you do? Is that flight gizmo one of the instrument listed in
the equipment list for the certified airplane?

--
Bob Noel
Looking for a sig the
lawyers will hate