Analysis of Adhesive Disbond Occurrences in Rotor Blades of Mi-2 Helicopters

Polish Air Force Institute of Technology (AFIT) is responsible for delivery service life extension program for the main rotor blades of multiple helicopters in the Polish Air Force (such as Mi-2, Mi-8/17, Mi-14, Mi-24). Due to the operational profile, certain number of blades got decommissioned when the calendar service life is reached, while the accumulated flight hour count is still below the hourly service limit. This is why a dedicated research program, as well as inquiry into the usage and technical condition of the blades is necessary. To maintain such a program, regular inspections of the blade structure are required.