46-27-01 DOUGLAS: (Was Mandatory Note 5 of AD-762-7.) Applies to C-54 Series Aircraft. \n\n\tTo be accomplished not later than November 1, 1946. \n\n\tInspect immediately the spar webs in the wing integral tank area to ascertain if reinforcements have been installed in accordance with Douglas Service Bulletin C-54-205 dated October 1, 1945. If not already installed, reinforcements must be added by November 1, 1946. Pending rework, airplanes which do not have reinforcements may be operated if daily inspection shows there is no leakage. Fuel should be carried in outer wing tanks as cracks may develop that might not be detected.