P-39D Interceptor Pursuit Airplane Bell Air Craft FIGHTER PLANE Instruction and service / repair book. RESTRICTED Military publication dated Aug / Sept. 1941. This book contains instructions for pilot operation along with a very extensive service section which includes removal of engine, wings, tailplane, electrical and mechanical repairs etc. The book also includes information on machine gun installation, ammunition magazines, altitude charts etc. Basically everything needed to keep the plane in military service. The P-39D was one of the main fighter aircraft used by both American and Russian military during the early years of WW2.