Sikorky Hydraulics
You cannot fly either the 58 or the 61 with "no hydraulics", or the 55 for that matter.
Part of your pre take-off check (as an earlier poster suggested) is that you check to insure that you cannot turn both hydraulics systems off at the same time.
This actually happened to me one time during the pre takeoff checks on a 61.
Finally, "Aux off " in a Sikorsky ain't that big a deal.
Last edited by oleary; 28th Jun 2016 at 07:00.