47-42-05 DOUGLAS: (Was Mandatory Note 2 of AD-781-1.) Applies to the Following DC-6 Airplanes: AAL Serial Numbers 42854 to 42865, Inclusive; Serial Numbers 42879 and 42880; UAL Serial Numbers 42866 to 42875, Inclusive; and Panagra Serial Numbers 42876 to 42878, Inclusive. \n\nTo be accomplished not later than August 1, 1948. \n\nIn order to prevent window curtain interference when opening emergency exit doors, remove hook assemblies, 2346313, -500, from curtain track, 5337482, and from the window curtain assemblies, 3343932-512, and replace with new slides, 1335554 and hooks 1345849 on each side of the four forward and the two aft cabin emergency exit door window frames. \n\n(Douglas Service Bulletin DC-6 No. 15 covers this same subject.)