Problem:
Engine damagage from foreign objects
Because of the enormous acceleration, foreign bodies or the remains from a bird strike that get into the engine during operation become projectiles and can cause damage of various extents (Foreign Object Damage, FOD). Since the replacement of engine parts represents a great time and cost factor, repair work is the first choice, as long as the work does not compromise the safety and performance of the aircraft. Damages considered repairable, for example, are small cracks and impact nicks on the turbine blades.