AN UNPLANNED FAN OUTAGE OCCURRED AT OUR TJS#4 MINE. FAN OUTAGE WAS DUE TO A POWER OUTAGE FROM THE UTILITY POWER SOURCE R.E.A. MINE WAS IDLE WHEN THIS OCCURRED. UPON ARRIVAL OF MINE FOREMAN/SUP T, HE RE-STARTED THE FAN, WAITED FOR NORMAL WATER GUAGE AND CONDUCTED A SPECIAL EXAMINATION. POWER CAME BACK ON 6:07 AM OF SAME DAY.