PPRuNe Forums - View Single Post - B747-400 QRH: "HYD CONTROL 1,4"
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Old 19th Jul 2016, 03:03
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NSEU
 
Join Date: Feb 2004
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I believe Korean Air Lines also has 4 ADPs (air-driven pumps).

Sorry for the confusion... I've never heard of the expression "Alt Demand Pump". Aux perhaps.

The Air Driven Pumps on the inboards are normally associated with PW engines, so I assumed the extra hydraulic flow was for the reversers. Extra demand was given as a reason for the message inclusion, hence my question.

Cheers
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