LARGE VIOLATIONS OF THE DELTA-I=1 2 RULE IN LAMBDA-N-]NN/

We investigate the weak conversion process LAMBDAN --> NN using the qu ark model and the QCD-modified effective weak Hamiltonian evaluated at a scale congruent-to 1 GeV. The results show large violations of the DELTAI = 1/2 rule for S-1(0) --> S-1(0) and S-1(0) --> P-3(0) transiti ons. The amplitudes for these transitions, moreover, are sufficiently large that the resulting violation should be readily detectable in lig ht hypernuclear decay experiments.