  Based on an integrated luminosity of 1.61 fb$^{-1}$ $e^+e^-$ collision data
collected with the KLOE detector at DA$\Phi$NE, the Frascati $\phi$-factory, a
search for the $P$- and $CP$-violating decay $\eta\to\pi^{+}\pi^{-}$ has been
performed. Radiative $\phi\to\eta\gamma$ decay is exploited to access the
$\eta$ mesons. No signal is observed in the $\pi^{+}\pi^{-}$ invariant mass
spectrum, and the upper limit on the branching fraction at 90\% confidence
level is determined to be ${\mathcal
B}(\eta\to\pi^{+}\pi^{-})<4.9\times10^{-6}$, which is approximately three times
smaller than the previous KLOE result. From the combination of these two
measurements we get ${\mathcal B}(\eta\to\pi^{+}\pi^{-}) < 4.4\times10^{-6}$ at
90\% confidence level.
