PPRuNe Forums - View Single Post - Jet goes down on its way to Medellin, Colombia
Old 29th Nov 2016, 18:17
  #64 (permalink)  
Join Date: Jan 2008
Location: Reading, UK
Posts: 10,981
Originally Posted by eagleflyer View Post
PEI, but where does hydraulic power come from when all engines have failed and the APU doesn´t run due to lack of fuel? I understand it would come from an electrical pump that would run on battery power (the only energy source left). How long would that battery last?
Why does that matter ?

The only powered primary flight control on the 146/RJ is the rudder; elevators and ailerons are controlled via conventional servo-tabs and will function perfectly well in the absence of hydraulic power.
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