  We present a detailed phenomenological study of charged-current-mediated
deep-inelastic scattering off longitudinally polarized nucleons at a future
Electron-Ion Collider. A new version of the event generator package DJANGOH,
extended by capabilities to handle processes with polarized nucleons, is
introduced and used to simulate charged current deep-inelastic scattering
including QED, QCD, and electroweak radiative effects. We carefully explore the
range of validity and the accuracy of the Jacquet-Blondel method to reconstruct
the relevant kinematic variables from the measured hadronic final state in
charged current events, assuming realistic detector performance parameters.
Finally, we estimate the impact of the simulated charged current single-spin
asymmetries on determinations of helicity parton distributions in the context
of a global QCD analysis at next-to-leading order accuracy.
