Trouble at SW? =20 Southwest Airlines August load factor falls=20 Wednesday September 4, 8:51 AM EDT=20 DALLAS, Sept 4 (Reuters) - Southwest Airlines Co. (LUV <http://money.excite.com/jsp/qt/full.jsp?time=3D0&symbol_search_text=3DLU= V> ), the nation's top discount carrier, said on Wednesday its August load factor, or percent of capacity in use, fell to 72.7 percent from 75.8 percent in the same month a year ago. Dallas-based Southwest said it continues to experience weak full fare customer demand, and bookings for September are also weak compared to historical levels. The company said it flew 4.3 billion revenue passenger miles in Auguest 2002, compared with 4.4 billion a year ago. Available seat miles increased 3.5 percent to 6 billion from 5.8 billion last August.=20 =A92002 Reuters Limited.=20