75-04-11 MCDONNELL DOUGLAS: Amendment 39-2094. Applies to Douglas DC-10 Series -10, -10F, -30, and -30F airplanes, certificated in all categories. \n\n\tTo prevent possible damage to the No. 2 engine due to ingestion of ice and snow, accomplish the following. \n\n\t(a)\tAfter the effective date of this airworthiness directive, when airplanes have been parked during icing conditions (freezing rain, snow, sleet) for any period of time which will enable ice or snow to accumulate on the airplane in the area of the No. 2 engine, inspect the top of the fuselage and the No. 2 engine inlet for the presence of ice and snow accumulation prior to starting engines. If found to exist, remove accumulated ice and snow prior to further flight.\n\n\tNOTE: Guidelines for inspection and safeguarding the aircraft are contained in these documents:\n\n\tDouglas AOL 10-546, dated January 11, 1974\n\n\tDouglas AOL 10-673, dated August 7, 1974\n\n\tDC-10 Maintenance Manual, Chapter 12-31-01 (b) Make appropriatemaintenance record entries to show compliance with this AD.\n\n\tThis amendment becomes effective February 21, 1975.