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Are There Dual Vacuum Pumps in C172S?

Asked by: 3626 views Aircraft Systems

Section 7 of the AFM clearly states that there are 2 vacuum pumps in the engine system section but only references an engine-driven vac pump in the vac system section. Also, I have only been able to locate 1 vac pump on an actual engine. Which is correct?

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1 Answers



  1. Aero Er. JD on Nov 05, 2016

    there are 2 vacuum pumps in the engine of the C172S.

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