B A R R Y wrote in
:

On Sat, 25 Nov 2006 23:59:37 -0500, "Morgans"
wrote:


Transponders are required for all registered aircraft, if they were
manufactured with an electrical system.

I respectfully ask for the FAR where that is written.

http://masl.to/?P28B1534E

FAR 91.215 section (b) paragraph (5)

(b) All airspace. Unless otherwise authorized or directed by ATC, no person
may operate an aircraft in the airspace described in paragraphs (b)(1)
through (b)(5) of this section, unless that aircraft is equipped with an
operable coded radar beacon transponder having either Mode 3/A 4096 code
capability, replying to Mode 3/A interrogations with the code specified by
ATC, or a Mode S capability, replying to Mode 3/A interrogations with the
code specified by ATC and intermode and Mode S interrogations in accordance
with the applicable provisions specified in TSO C–112, and that aircraft is
equipped with automatic pressure altitude reporting equipment having a Mode
C capability that automatically replies to Mode C interrogations by
transmitting pressure altitude information in 100-foot increments. This
requirement applies—

....

(5) All aircraft except any aircraft which was not originally certificated
with an engine-driven electrical system or which has not subsequently been
certified with such a system installed, balloon, or glider—