In addition to the Apia incident, I now have information on events that involved invalid LLZ and/or GP signals at :
Rio;
Madrid;
Rabat;
La Reunion; and
Cranbrook.
I also have information on the Guam CFIT. I can't yet conclusively link the Guam prang with invalid GP data because of the action of the aircrew, as evidenced from the CVR but, if I add this to the list, it makes a total of SEVEN events since 1997. This is disturbing, most especially because I feel that insufficient action has been taken to prevent the problem, or even to minimise the residual risk.
However, does anyone have information about similar events at other places around the world. I have an oblique reference to an incident at San Francisco, date unknown, that may have occurred while ILS flight calibration was in progress.