OK. got workiing prototype now, works!

Moose Development/Moose/StateMachine.lua

@@ -108,6 +108,7 @@ function STATEMACHINE:_create_transition(name)
         
         local fsmparent, event = self:_isendstate( to )
         if fsmparent and event then
+          self:_call_handler(self["onstatechange"], params)
           fsmparent[event]( fsmparent )
         else
           self:_call_handler(self["onenter" .. to] or self["on" .. to], params)

Moose Development/Moose/TaskClientSead.lua

@@ -43,7 +43,8 @@ function TASK2_SEAD:New( Client, Mission, TargetSet )
       onMoreTargets = self.OnMoreTargets,
       onDestroyed = self.OnDestroyed,
       onKilled = self.OnKilled,
-    }
+    },
+    endstates = { 'Success', 'Failed' }
   } )