Originally Posted by
80ktsClamp
Is there any way there could have been a "down stream" electrical failure causing the shuttle valve to fail closed?
I remember that AA 757 that had the battery contacter (sp?) failure lost way more stuff than any of my previous systems knowledge would have anticipated... despite having full AC generator power.
That's what I was saying before. If they had a complete center hyd failure coupled with an electrical failure powering that hydraulic valve, then that would explain this scenario. Other than just completely screwing the pooch, that is the only way I can come up with a plausible explanation. I wonder if there is a circuit breaker associated with that valve. Next time I fly a 767, I'm going to look for one. I doubt there is one, but wouldn't that suck for them if they missed a pulled CB which caused that valve to close? Ooooooops