  Lorentz invariance is one of the fundamental principles of physics, and, as
such, it must be experimentally tested. The purpose of this work is to obtain,
within the Standard-Model Extension, the dynamics of a Lorentz-violating spinor
in a uniform newtonian gravitational field. This is achieved by treating the
spinor as a test particle and introducing the gravitational field through a
uniformly accelerated observer. The nonrelativistic hamiltonian is obtained and
some experimental consequences are discussed. One unexpected outcome of this
work is that the gravitational field helps disentangling bounds on coefficients
for Lorentz violation.
