"Beavis" wrote in message (The radio altimeter is one of the primary
inputs to the GPWS.)

However, the GPWS was no integration with autothrust, autopilot, or FADEC on
the A-320. The message is generated by the radio altimeter if the
autothrottles are
still in the climb detent. It sounds at 40'AGL if one or both APs are
engaged, or at
20'AGL if the APs are not engaged.

D.