PPRuNe Forums - View Single Post - B747-8: Hydraulic Demand Pumps and Main tank fuel pumps powered by DC?
Thread: B747-8: Hydraulic Demand Pumps and Main tank fuel pumps powered by DC?
View Single Post
Old 21st Feb 2022, 15:38
  #2 (permalink)  
CV880
 
Join Date: Nov 2004
Location: North America
Age: 79
Posts: 206
Likes: 0
Received 1 Like on 1 Post
I don't have any info on the 747-8 but on the 744 control of the Hyd Demand Pumps is via DC while the pump motors themselves are 3 phase AC powered. So if you lose DC Bus 2 you lose control of the Demand Pump 2. Expect the 747-8 to be similar.
CV880 is offline  
Reply