I don´t know B757/B767 systems but lots of my friends do and fly them daily but me question is, you´ve already beaten murphy´s once today, then twice with that alternate system not working at all and you fly over the atlantic where murphy´s is most expected to come again (it did at the end)
Great landing for the guys, I wish I could do one like that but still don´t get the point to risk that long flight back to Warsaw. You´re ETOPS, is still the aircraft ETOP´s if you get that system failure?
So far on my trainning during the last 20 years if you have a main system failure stay where you are and then think, look at the alternatives and then proceed, but surely I will not go 7-8 hrs over the atlantic if I have an alternate airport 30 minutes away, come on, it´s an hidraulic system failure, it´s not an FMS or one generator off line.