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Old 27th Jan 2023, 13:43
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320.jockey
 
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CFM56 Oil System Pumps

Hi folks,

new here with a quick question for the experts, just out of interest.

I can't find an exact explanation in my operations manual of the kind of pumps (oil supply + scavange pumps) used in the engine oil system of the CFM56 (in my case -5A/-5B). My guess is they are engine driven, as that would make a lot of sense and there is no CB for an engine oil pump in the cockpit (as far as I know). But I couldn't find any confirmation there or via google.

Can anyone confirm or clarify?
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