Originally Posted by
capricorn23
I also flew a 4-engined aircraft for 15 years (B744) and practised a 2-eng approach at sim... without other failures together... in that case (El Al) they lost 2 engines on the right wing and all the hydraulics moving the relevant lift devices... it's a "quite complicated scenario"... they had also the flight engineer... unfortunately no one realised the relationship between the loss of hydraulics on one side and the asymmetric lift situation which led them to lose control...
It's been a long time since I worked on the 747 but I thought the high lift devices were linked mechanically so how does the loss of one or even two hydraulics systems cause assymmetrical deployment of flaps/flaps?