BORESCOPE GUIDE TUBE

An inspection assembly for inspecting the interior of a gas turbine engine, or similar complicated structure, is shown to include a guide tube which is insertable through a number of aligned access ports in the engine. The guide tube is designed to direct the distal tip of a suitable inspection device, such as a fiber optic borescope, to appropriate internal areas for inspection. The tube includes a curved section, which is formed of material with a built-in "memory," i.e., will retain its initial curvature when in its free state, but also is sufficiently flexible to permit straightening such that extremely small access ports may be provided in the device being inspected. A novel method of using such apparatus is also disclosed.