DURING A WEEKLY AIRCOURSE EXAM A FALL WAS FOUND 1 X-CUT INBY STATION 790 IN X CUT 5-6 ON SWI AT 12 WALL. ALL ACCESSES TO FALL WERE CRIBBED AND TIMBERED OFF AND DANGER SIGNS HUNG. THE FALL IS A BOUT 20'L X 20'W X 6""H. THE ARCA WAS BOLTED WITH60"" FULLY GROUTED RESIN BOLTS WITH 6X16 PLATES. VENTILATION WAS NOT INTERUPTED. NO MEN OR EQUIPMENT WERE INVOLVED.