  Recent simulation studies indicate that right-handed neutrinos may be
discovered at future high luminosity LHC runs as long as a new neutral gauge
boson, $Z^{\prime}$, have been discovered first. In this case, when
$Z^{\prime}$ is resonantly produced at the LHC it, subsequently, decays into
pair of right-handed neutrinos with mass up to TeV scale. Then the decay of
these neutrinos leave as signature tri-lepton final states and/or same-sign
di-muon and a boost di-boson. The prospect of discovering right-handed
neutrinos through this mechanism has been developed within abelian gauge
extension of the standard model. In this work we study the processes involved
in this discovery mechanism within the framework of the 3-3-1 model.
