  We present a nonrelativistic transition potential for the weak
strangeness-changing reaction $\Lambda N \to NN$. The potential is based on a
one meson exchange model (OME), where, in addition to the long-ranged pion, the
exchange of the pseudoscalar $K, \eta$, as well as the vector $\rho, \omega,
K^*$ mesons is considered. Results obtained for different hypernuclear decay
observables are compared to the available experimental data.
