The forward pointy thing on the tail of a TU134/TU154 does not contain DU (why should it as it doesnt move and is not a control surface), it does not contain the jackscrew which is within the vertical tailplane itself at the top, it does not move, it is an aerodynamic device which has effect on the airflow over the tailplane
A Russian GSGA Inspector has just told/confirmed to me on the phone
