Old 06-14-2018, 05:22 AM
  #2  
Packrat
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Joined APC: Nov 2013
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In a lot of systems there is a cable back up to the hydraulic system. In fly-by-wire systems there can be 3 or more independent hydraulic systems that use ram air turbines (RATs) to provide electrical power for the hydraulic pumps in case of electrical failure.
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