The FAA announced last week that it proposed fines against both Great Lakes Aviation and Southwest Airlines for unrelated FAR violations. The FAA claims that Great Lakes flew a Beech 1900 on 19 different occasions when the aircraft’s de-icing fluid was heated to temperatures exceeding the 180-degree limit that could possibly damage the aircraft. Southwest Airlines was accused of incorrectly wiring a windshield heater switch on a Boeing 717 and operating that aircraft on 1,140 passenger flights before the error was detected. The FAA proposed levying a $304,000 fine against Great Lakes and a $325,000 fine against Southwest. Both airlines have 30 days to appeal the rulings.