Given the level of confusion often exhibited by FAA bureaucrats regarding airworthiness as defined by the FARs, is anyone really surprised there might be disagreement out here among us unenlightened (albeit really well-informed unenlightened) about the subject?

Brent,

I'm sorry it pains you so to consider you may be misinformed that you resort to insulting language, but the facts are the facts.  Only the Altimeter installed must meet TSO according to the regulations.  Other instruments installed in an Experimental aircraft are not subject to that rule, and no other rule requires it.  By installing a non-TSO instrument in the aircraft the builder is "personally certifying" that the instrument is suitable to flight for the regimes of flight for which it will be used.

Casting insults does not change the regs; it only highlights that some people unfortunately react immaturely when faced with the possibility that what they think they know is incorrect.

Fly Safe!

Bill



On 01/-10/-28163 02:59 PM, Brent Regan wrote:

A TSO is a TSO is a TSO.

Bill writes:

<<< It is not true that every other piece of equipment in an experimental aircraft must meet TSO.>>>

What I  wrote was " You MUST have at least one of each of the required instruments and they MUST meet the TSO, regardless of whether the manufacturer has TSO Authorization or the altimeter has TSO Design Approval."

Bills confusion is not uncommon.