  Context. Quasar outflows are often analyzed to determine their ability to
contribute to active galactic nucleus (AGN) feedback. We identified a broad
absorption line (BAL) outflow in the VLT/UVES spectrum of the quasar SDSS
J1321-0041. The outflow shows troughs from Fe II, and is thus categorized as an
FeLoBAL. This outflow is unusual among the population of FeLoBAL outflows, as
it displays C II and Si II BALs. Aims. Outflow systems require a kinetic
luminosity above $\sim0.5\%$ of the quasar's luminosity to contribute to AGN
feedback. For this reason, we analyzed the spectrum of J1321-0041 to determine
the outflow's kinetic luminosity, as well as the quasar's bolometric
luminosity. Methods. We measured the ionic column densities from the absorption
troughs in the spectrum and determined the Hydrogen column density and
ionization parameter using those column densities as our constraints. We also
determined the electron number density, $n_e$, based on the ratios between the
excited-state and resonance-state column densities of Fe II and Si II. This
allowed us to find the distance of the outflow from its central source, as well
as its kinetic luminosity. Results. We determined the kinetic luminosity of the
outflow to be $8.4^{+13.7}_{-5.4}\times 10^{45}\text{ erg s}^{-1}$, and the
quasar's bolometric luminosity to be $1.72\pm0.13\times10^{47}\text{ erg
s}^{-1}$, resulting in a ratio of $\dot{E}_k/L_{Bol}=4.8^{+8.0}_{-3.1}\%$. We
conclude that this outflow has a sufficiently high kinetic luminosity to
contribute to AGN feedback.
