Xnr,
Thanks for the swipe at the Sultan, who should be sent to his room, preferably in a 412 so that he is gone longer.
I am reminded of the hurricane evacuation once done in the US Gulf, where the 76's evacuated twice the number of folks as compared to the 412, due to fuel capacity (range) and speed. The 76A carries more than the 412 Cat A at distances over about 100 miles (scarey distances for Bell drivers).
Regarding ground runs, the certification of the procedure is not really the whole issue. The tehnique I describe is acceptable. Also, we do have at least two zero ground run procedures for the 76A, but I'll guess that you don't have them.
Regarding the idle time, I will check on that with Dave Wright, the Chief Project Pilot.