How do you get a flap or gear HYDRAULICAL failure (so not getting stuck or tire blow-out)? So you have to lt the flaps down by the electrical driven flap engine. I thought about shutting down the hydraulical systems where the flaps and gear are on. But does anyone know on wich hydraulical system they are (L,C,R)?

Have a look at the 767 PIC Non-Normal Checklists. They have a nice diagram of what systems are affected when specific hydraulic systems are shut off.-twilky

Well, I haven't got the CD here, so I can't look at the docs. Could anyone else look ar the manual?

No prob, found the manual at the WILCO website

They are on CENTER. Best Wishes,Randy J. [email protected]" A little learning is a dangerous thing"

Interesting P&W-powered 767 hydraulics diagram.... I hadn't noticed that the Centre A/P servos can be powered by the RAT. Does this mean that if you lose both engines in flight, then turn on the APU (for electrics), that you can use the Center A/P for a descent? :-)Cheers.Ian.

Hey Ian, Sorry been moving. This is the official Boeing CBT for the 757/767. I don't know about your question regarding the APU but this sure covers ALL possible ways it could be done, just have not looked it up .Best Wishes,Randy J. [email protected]" A little learning is a dangerous thing"

I don't think you would need to use the RAT anyway for hydraulic power. The APU could be powered up to provide electricity to power all the Elec Hydraulic Pumps. If the RAT deployed due to a dual engine failure, I'm wondering what would happen if you powered up the Center Hydraulic system with APU electrics: I have the feeling that the hydraulic pressure would "backdrive" the RAT and the 767 would become a rather large pusher-propeller-driven aircraft :-hahCheers.Ian.