  We construct topological defects generating non-abelian T-duality for
isometry groups acting without isotropy. We find that these defects are given
by line bundles on the correspondence space with curvature which can be
considered as a non-abelian generalization of the curvature of the Poincar\`{e}
bundle. We show that the defect equations of motion encode the non-abelian
T-duality transformation. The Fourier-Mukai transform of the Ramond-Ramond
fields generated by the gauge invariant flux of these defects is studied. We
show that it provides elegant and compact way of computation of the
transformation of the Ramond-Ramond fields under the non-abelian T-duality.
