Is involved in the degradation of n-alkanes with C chain lengths of 32 and longer. Allows Acinetobacter sp. strain DSM 17874 to grow on long-chain n-alkanes such as dotriacontane (C32H66) or hexatriacontane (C36H74) as a sole carbon source. Binds 1 FAD per subunit. Hydrocarbon metabolism; alkane degradation. Cells lacking this gene can no longer utilize n-alkanes with C chain lengths of 32 and 36, but can still grow with C24, C20, C16 alkanes or acetate as a sole carbon source. Belongs to the FAD-binding monooxygenase family.