AAF Technical Order No. 01-75AA-1, Air Ministry AP1690D. Operation and Flight Instructions (pilot's notes) for the Lockheed Hudson IV Airplane powered with Two Twin Wasp R-1830-SC3G Engines. Published by authority of The Commanding General , AAF and dated April 1942 (revised may '42). 210 x 275mm. Looseleaf (stapled), 20p (40 sides). Essentially an AAF produced set of British Pilots Notes. Illustrated with diagrams/charts etc but these do not have the pull-out photos of the cockpit area like normal pilots notes. A little dog-eared around the edges but in good used condition overall. Stock code P16104.