146 fixer
The engineering company looking after this aircraft have told the owners that the aircraft CAN be flown without the spinner.
They only have to look out of the window to see a number of glider tugs flying all day without spinners to see that no harm will come to the aircraft !.
Why this debate has come this far I cant understand the owners have paid for professional advice and now they seem to want to check that out on an public forum inhabited by people of unknown qualification to comment.
As for the link to the maintenance company above if you think that these people are good and you have no financial conection to them all well and good but if you are connected then this link breaks the pprune rules on advertising and should be deleted.