  We perform a detailed study of the $\text{b} \to \text{c} \tau \nu$ and
$\text{b} \to \text{s} l^+ l^-$ processes in a minimal flipped 331 model based
on the $SU(3)_C\times SU(3)_L\times U(1)_N$ gauge symmetry. The non universal
$SU(3)_L \times U(1)_N$ symmetry in the lepton sector gives rise to non
universal neutral and charged currents involving heavy non SM gauge bosons and
SM leptons that yield radiative contributions to the $b \to s$, $b\to c$, $s\to
u$ and $d\to u$ transitions arising from one loop level penguin and box
diagrams. We found that the observables related to these transitions agree with
their experimental values in a region of parameter space that includes TeV
scale exotic up type quarks, within the LHC's reach.
