AN UNPLANNED FAN OUTAGE OCCURRED AT OUR PENNVIEW MINE DUE TO A POWER PROBLEM THAT OUR POWER SUPPLIER TO OUR FACILITIES, EXPERIENCED ON THEIR END. MEN WERE WITHDRAWN FROM THE MINE. THE POWER WA S RESTORED AT APPOX. 0840, THE SAME SHIFT, AND SPECIAL EXAMINATION CONDUCTED BEFORE MEN WERE PERMITTED BACK IN MINE.