Good point 16024 makes about terrain. In fact I remember a big airways tristar going off the end at Leeds many moons ago after an autoland went wrong. The report mentioned a bump in the runway confusing the autothrottle. The aircraft was stuck there for weeks.
Thanks for your kind wishes Captplaystation, unfortunately days off has turned into 36 hours and a fun 15 hour day tomorrow!
Flying classics and NGs I haven't seen fail operational autopilots. If you don't see the annunciation Land 2 or Land 3 then you are fail passive.