rudder/fin separation and satcom links...
Rudder Travel Lim. Fault in the Acars Messages and its link to rudder/fin/whatever loss would stand valid only if someone proved that the SatCom link would keep functional after the separation.
Either it must be plausible that the a/c wings could keep minimally horizontal and also minimally stable in that position with a missing rudder/fin/whatever or it must be proven that the satcom (electronically steered / phased array ?) link would stand even to abrupt changes in the a/c roll, pitch angle.