(1ST OF 2 ROOF FALLS THIS DATE.) AN UNINTENTIONAL ROOF FALL WAS DISCOVERED DURING A WEEKLY AIR COURSE EXAM. THE FALL WAS FOUND IN THE #3 ENTRY ON THE 2 NORTH MAINS, #38 BLOCK ALONG #4 MAINLINE BELT. FOOTAGE MARK 75 + 15 IN A RETURN AIR COURSE. THIS FALL HAS BEEN DANGERED OFF & CRIBBED. THE FALL MEASURED 31' LONG X 18' WIDE X 7' HIGH.