What is the difference between the Sensor Systems S67-2002 and Honeywell KA-54A radar altimeter antennas?
There is no physical, technical, or functional difference at all between the Sensor Systems S67-2002 and Honeywell KA-54A antennas. Honeywell (Bendix/King) obtains the antennas from Sensor Systems, labels it with Part Number 071-01501-0000. In fact, Honeywell even lists the generic Sensor Systems P/N S67-2002 as a recommended antenna for the KRA-405B radar altimeter system. Please see this excerpt from the KRA-405B installation manual.