Douglas Aircraft service books 1940's -'50's - $5 (E. Northport)
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Very good, July-August 1956, Sept-Oct 1956, July-Aug 1957, Nov-Dec 1957, Jan-Feb 1958. Covering DC-6A/B, DC-7, military, cabin pressure, finishes, Inspection with magnetic particles, lubrication, torques, cable terminals, plating, ground maneuvering, hydraulics, instruments, heaters, maintenance, engineering, landing gear, fail safe and structural design, weighing, spares, shoring, valves, etc. $20/all, can mail
From the Airlines War Training Institute, instruction/work books:
Hydraulic Principles, 1942, prepared for ground and air crew students and instructors, 115 pages, $5
Mechanical Principles, 1943, 66 pages, $5
Engine Principles, 1943, 223 pages $5