THE RACK AND PINION TYPE ELEVATOR WAS BEING CALLED TO THE SURFACE AFTER TWO FIRE BOSSES COMPLETED RIDING IT TO THE BOTTOM. AN ELECTRICAL FAILURE OF THE LIMIT SWITCHES OR OTHER ELECTRICAL CONTR OL FAILED AND THE ELEVATOR WAS DAMAGED AS IT PASSED THE UPPER STATION. TWO SECTIONS WERE EVACUATED SINCE THIS WAS A DESIGNATED ESCAPEWAY. AIR CHANGE MADE FOR PROVIDING AN ALTERNATE ESCAPEWAY.