Originally Posted by BEagle
Courtney, I can't remember, but surely a single engine failure didn't lead to an immediate PC failure unless the engine seized? Was there an hydraulic accumulator in the PC system?
Utility system was pressurized by a pump on each engine and each PC pump would produce pressure well below idle. Yes, each PC had a big (50 cubic inch) accumulator, but that wouldn't run the system for long with no pump pressure.
As you say, unless the engine had siezed or was just at very low rpm after a flame out at high altitude/low airspeed, the windmilling engine could power the system.
Of course, each flight control surface was powered by more than one hyd system anyway. So the loss of one PC circuit still left the stabs powered by the other one and the spoilers and ailerons powered by the utility system, so ne real snag.