Originally Posted by
SASless
212Man,
Are you asking if each Hydraulic System can be turned off individually by a Control Switch?
I cannot imagine this day and time the Blackhawk would have the old S-58T/S-61 AUX/Primary Hydraulic set up as I cannot imagine the US Army not spec'ing a dual/equal system with the ability to shut off a malfunctioning system.
The UH-1C/M, AH-1G/S had a dual hydraulic system with no provision for turning off a malfunctioning system. There was a Test Switch that was spring loaded to BOTH, you could momentarily turning off a single system to do run-up checks. The AH-64 series has dual hydraulics with no HYD control switches at all. The AH-64 series have no hydraulics off capability, the flight controls simply move an input lever on the servo which moves the spool valve, the servo is bolted to the deck and cannot be manually moved.