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Advisory Circulars (ACs)

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Advisory Circulars (ACs) search results
Number Title Status Office Date
20-24D Approval of Propulsion Fuels, Additives, and Lubricating Oils

This advisory circular (AC) provides guidance applicable to adding fuels and oils as engine, aircraft, or auxiliary power unit (APU) operating limitations.

Active AIR-20 2014-06-30