  We observed twelve Plutinos over two separated years with the 4.3m Lowell's
Discovery Channel Telescope. Here, we present the first lightcurve data for
those objects. Three of them (2014JL$_{80}$, 2014JO$_{80}$, 2014JQ$_{80}$)
display a large lightcurve amplitude explainable by a single elongated object,
but are most likely caused by a contact binary system due to their lightcurves
morphology. These potential contact binaries have rotational periods from 6.3h
to 34.9h and peak-to-peak lightcurve variability between 0.6 and 0.8mag. We
present partial lightcurves allowing us to constrain the lightcurve amplitude
and the rotational period of another nine Plutinos. By merging our data with
the literature, we estimate that up to $\sim$40$\%$ of the Plutinos could be
contact binaries. Interestingly, we found that all the suspected contact
binaries in the 3:2 resonance are small with absolute magnitude H$>$6mag. Based
on our sample and the literature, up to $\sim$50$\%$ of the small Plutinos are
potential contact binaries.

Earth and Planetary Astrophysics