Maintenance manual for the Douglas DC-4, marked "Engineering Copy" on the title page, 9 x 11.5, with a revision date of August 20, 1946. Contained in its original blue Douglas Aircraft Co. binder, the manual provides comprehensive instructions for handling, inspection, and maintenance. It is separated by tabs for general handling, service inspection, engine, carburetor, engine electrical system, propellors, hydraulics, wing group, tail group, fuselage, finishes, electrical system, communications, instrument systems, fuel system, oil system, flight controls, automatic pilot system, power plant controls, heating and ventilation system, interior maintenance, de-icer system, anti-icing equipment, oxygen system, and fire protection equipment. The binder is exhaustively illustrated with diagrams, schematics, and images of the various parts and systems. In fine condition, with some foxing to the first page.