Years ago we had an issue with a particular engine type - they suddenly had a rash of compressor failures (stators were breaking). Funny part was the engine failures were all occurring at a couple operators - the rest of the fleet was fine.
What we discovered was that the operators who were having the engine failures were doing derated climbs. Turns out that, during a derated climb the lower rotor speeds could cause a resonance in the compressor that fatigued the stators. Full rated climb avoided the rotor speed rangers that could cause the resonance. Talk about your false economy
(they did change the design to get rid of the resonance though).
It's counter-intuitive, but derated takeoffs can also increase noise - the engine is creating less noise but because the aircraft climbs slower, a larger area is exposed to the noise.