This Letter describes a direct search for charged Higgs boson
production in ppbar collisions at sqrt s = 1.8 TeV recorded by the Collider
Detector at Fermilab.  Two-Higgs-double extensions to the standard model
predict the existence of charged Higgs bosons (H^+/-).  In such models, the
branching fraction for top quarks B(t -> H^+b -> tau^+ nu b) can be large.
This search uses the hadronic decays of the tau lepton in this channel to
significantly extend previous limits on H^+/- production.