In article ,
"Frode Berg" wrote:

Hi!

Anyone have any experience in changing OAT gauge an old Cherokees?
Ours has the old probe sticking out the tope of the windshield, but after
replacing it twice with new units, it still doesn't work.....

We would love to get a newer more reliable digital OAT readout.

Anyone got any ideas of a good unit, preferably with a website.
Is there a lot of fuss to change this paper wise?
I mean, do we need an approval, or is this not considered a major change?

I put a Davtron M303 in my cherokee 140 - it's a simple thermometer
and also displays voltage.

In early July 2005, there was a thread about Digital OAT which had, I think,
some discussion of some various OAT probes.

wrt paperwork. Since I was doing 337's for an engine change and
some other stuff, I did the 337 at the same time. Oh yeah, the
other reason for the 337 is that the M303 is not PMA'd for the cherokee
(but is for Beech aircraft). And, of course, I talked to the FSDO before
proceeding.

--
Bob Noel
no one likes an educated mule