  We examine the JEM-EUSO sensitivity to gravity effects in the context of
Randall-Sundrum (RS) model with a single extra dimension and small curvature of
the metric. Exchanges of reggeized Kaluza-Klein gravitons in the $t$-channel
contribute to the inelastic cross-section for scattering of ultra-high-energy
neutrinos off nucleons. Such effects can be detected in deeply penetrating
quasi-horizontal air showers induced by interactions of cosmic neutrinos with
atmospheric nucleons. For this reason, we calculate the expected number of
quasi-horizontal air showers at the JEM-EUSO observatory as a function of two
parameters of the RS model.
