  Recently the ATLAS and CMS collaborations reported their search for a new
heavy gauge boson $W'$ with one lepton plus missing transverse momentum. We
find that $W^{(2)}$, the second Kaluza-Kelin (KK) state of the $W$ boson in the
minimal Universal Extra Dimension (mUED) model, can be a good candidate for
this signal, as its branching ratio into $\ell\nu$ is sizable. Moreover, nearly
degenerate KK mass spectra in the mUED model yield generically very soft SM
particle accompanying $W^{(2)}$ from the subsequent decays of the second KK
quarks and gluons. In a hadron collider, this indirect $W^{(2)}$ production is
difficult to distinguish from the $W^{(2)}$ single production. The involved
strong interactions make it more important than the single production. The
early LHC data on $\ell+\met$ signal for 1.1 fb$^{-1}$ integrated luminosity is
shown insufficient to limit our model even with significant indirect production
of $W^{(2)}$. However, the results show that the present LHC 5.6 fb$^{-1}$ data
can cover most of the reasonable parameter space of the mUED model.
