2009-NM-232-AD - McDonnell Douglas Corporation Model DC-8-31, DC-8-32, DC-8-33, DC-8-41, DC-8-42, and DC-8-43 Airplances; Model DC-8-50 Series Airplanes; Model DC-8F-54 and DC-8F-55 Airplanes; Model DC-8-60 Series Airplanes; Model DC-8-61 Series Airplanes; Model DC-8-70 Series Airplanes; and Model DC-8-70F Series Airplanes