Hardcover book entitled "Instruction Manual, Electricity, PB4Y-2 Airplane," by the Consolidated Vultee Aircraft Corporation, 8.5 x 11.25, 148 pages, published in 1944. The handbook covers the basics of electricity, wiring diagrams for the aircraft, its electrical system in general, primary power circuits, engine control circuits, ignition and control circuits, propellor controls, interior light circuits, exterior lighting, warning and signal systems, bomb release circuits, armament and camera, and more. In fine condition, with rubbing and light soiling to boards, an ownership inscription to first free end page, and bumped corners.