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? |
Originally Posted by 320.jockey
(Post 11375047)
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? I'm unaware of any engine that uses aircraft power to drive an oil pump - you wouldn't want a problem with the aircraft electrical system to cause all the engines to fail. |
Yup, makes sense. I just found it a bit odd that in the system description it's not stated explicitly, however in the description of all other accessory gearbox components - for example the HP fuel pump - it is. Thanks nevertheless :)
|
Yup, and IDK if I'm correct, but I guess they use a CVT (transmission) to maintain accessory shaft RPM.
CVT's are super cool, and it's kinda funny how they're used everywhere, from my collegiate Baja ATV's to a freakin' CFM56. |
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