We are talking about SE a/c here so reference to the Boeing isnt relevant.
G-ATRR wasnt an engine failure and no cause of failure were found. Carb icing was suggested as being possible. The a/c struck a promulgated obstruction on the approach which was notified in the AIP.
Most instructors teach returning tbe carb air control to cold on PA 28s at around 300ft a very foolish procedure
If you look at my early post wihch stated
However at an airfield that does have a hostile approach area consideration should be given to flying a full glide approach to the threshold
An approach with an obstacle promulgated in the AIP is a hostile approach area.