no electric variometers are TSO'd.! nor do any need TSO...they are simply
not required flight instruments on any TCDS...this is not to say that
anyone, owner or operator can install an electric variometer or for that
matter anything that is bolted down or in any way attached to any aircraft
without at least doing the minimum paperwork since every change requires
Wt/Bal and minimal log book entry is not a 337 depending on what category
the airworthiness is...the only variometer with any approval type is Winter
(mechanical) since it is approved EASA Form one as are nearly all Winter
instruments.
tim
Please visit the Wings & Wheels website at www.wingsandwheels.com

wrote in message
...
I am considering installing a new Tasman in my Standard Cirrus. I
noticed that the description says for "sport aircraft only". Is the
Tasman not TSO'd? If not are you guys having any trouble getting 337
forms approved for installation in certified gliders? Let me know
what route you are taking with the paperwork. I think this vario will
be just the ticket for me if it can be installed in a certified
glider.

Lane