  We present SOFIA/FIFI-LS observations of five prototypical, low-mass Class I
outflows (HH111, SVS13, HH26, HH34, HH30) in the far-infrared [OI]63mum and
[OI]145mum transitions. The obtained spectroscopic [OI]63mum and [OI]145mum
maps enable us to study the spatial extent of warm, low-excitation atomic gas
within outflows driven by Class I protostars. These [OI] maps may potentially
allow us to measure the mass-loss rates ($\dot{M}_\text{jet}$) of this warm
component of the atomic jet.
