Maybe now the CAA will look at making CVR's and a simplified FDR mandatory on all Public Transport aircraft including smaller business jets - regardless of weight. An FDR would be especially useful in the case of this accident to determine the exact chronological order of the causes and effects of the engine vibration, rather than just the evidence available at the scene of the accident.
Do you have an idea what effort putting a FDR or DFDR (which gets way more information) on a 33 year old, most probably fully anaolg airplane would be? YouŽd probably rather get a newer airplane instead of wasting money. Or donŽt own one at all. A simplified FDR would not really make that much sense, if got say, just HDG/ASPD/ALT, what would that reveal in a case like this?
IŽd think that the AAIB has a lot of pointers already (eng vibs)...