What would be the chances, though, of your "average" PPL, provided they managed to get a VHF-COM box working on the right frequency, of someone working their way through setting the aircraft up for a 'Cat IIIb'-style autoland?
For example, if our budding hero managed to wrestle the aircraft away from imminent peril, got a radio working and lo, there's a captain of the same type available on 121.5 ... would they stand a chance at programming the FMS in such a way that the aircraft could fly itself to a reasonable (read: survivable) landing? Rather than letting John. Q. Frustrated-PPL loose with however many tons of screaming metal...
Bear in mind I've no real knowledge of AFCS-type stuff, especially when fitted to heavy metal...
-D