Originally Posted by
Grav
"The loudspeaker announces RETARD at:
‐ 20 ft, or
‐ at 10 ft if autothrust is active and one autopilot is in LAND mode."
Source: A320 FCOM.
Speed is not mentioned so radio altitude only appears to generate the automatic callout. By the way, their speed was due to the fact that they were on a very steep approach path, apparently, and not because they had too much power applied, so whether the callout was generated or not is not a factor i think.
thanks Grav. I’ve been wondering if PF ever retarded throttle at all. As you say their speed was more due to approach energy than power application though.