On 22 Aug 2007 12:56:36 GMT, Bob Moore
wrote in 28:

Larry Dighera wrote

On Wed, 22 Aug 2007 07:36:51 -0400, Ron Natalie
wrote in :

A visual indicator by itself, by the way, doesn't qualify.

Where does it say that?

The PA28-235 is equipped with only a red panel light.

(b) The stall warning may be furnished either through the inherent
aerodynamic qualities of the airplane or by a device that will give clearly
distinguishable indications under expected conditions of flight. However, a
visual stall warning device that requires the attention of the crew within
the cockpit is not acceptable by itself.

Bob Moore

There seems to be a bit of ambiguity in that quote: "a
visual stall warning device that requires the attention of the crew
within the cockpit is not acceptable by itself."

The stall warning light mounted in the center of the left hand panel
in the PA28-235 doesn't require the crew's attention; it gets it. So
I guess it's approved.