#ndt To ensure the safe operation of an aircraft, the entire structure must be routinely and diligently inspected for damage and a decision made on whether it should be kept in service or withdrawn for repairs. Borescope inspection (BSI) is a technique used to visually inspect the internal structure of aircraft engines. The structure of compact gas-turbine engines—used for helicopters, small aircraft, etc.—is relatively simple, so there are only a few parts to inspect. The internal components include a compresso
Source: NDT