def METHOD_NAME(self, idx):
    ''' Aircraft delete. '''
    # Remove element (aircraft) idx from all lists and arrays
    for child in self._children:
        child.METHOD_NAME(idx)
    for v in self._ArrVars:
        self.__dict__[v] = np.METHOD_NAME(self.__dict__[v], idx)
    if self._LstVars:
        if isinstance(idx, Collection):
            for i in reversed(idx):
                for v in self._LstVars:
                    del self.__dict__[v][i]
        else:
            for v in self._LstVars:
                del self.__dict__[v][idx]