JimEli;
As I see it, ground operation of a helicopter without a pilot at the controls is explicitly authorized by the FAA via AC 91-32, Safety in and Around Helicopters:
(2) Ensure that all controls are secured in accordance with the aircraft flight manual and the company operations manual.
JimEli;
The AC clearly outlines the permissibility. To argue the opposite is futile.
You have the last word...
Ok Jim, How about a 'last word' being a request to a link, a link to the page in the B3e FM that states how the controls should be secured?
Because without that, you can't have the 'and'.