Since it has been a big topic in the news lately here is an engine that has had some damage, most likely from birds. One thing that might amaze you is alot of this damage is allowable!! Here are some captures I took tonight while boroscoping an engine comming off one of our 757's. The engine is a Rolls Royce RB211-535. No comments on picture quality or focus or any of that stuff. These are still captures from a 7mm fiber optic video boroscope. My little $50,000 work toy, er I mean tool. This is the front of the engine. The ring of blades closest to the white area in top right, is where the air goes inside the engine. From that middle ring (arcing down from top middle, to right middle)is the dividing point from air that goes inside the motor. And the air that bypasses the internal areas of the motor. The air that bypasses is just air that is accelerated by the big fan. This is a third stage Intermediate Compressor blade. Compressor section does exactially what its name implies. It compresses the incomming air. This is a picture of a good blade. This is a bad blade. Little different type of damage. Notice the streak comming from it. Now were getting down right mad. Couple of twins want in on the act. This motor is being changed tomorrow.