Dear Blender Pilot,
If Lu is not correct about possible replacement of components, he should be. Pilots and engineers are often shocked when they see drive train load data after even minor compressor surge and/or stall events. These events are often referred to as "ringing" the drive train and the reduction in component lives can be significant. Repetitive turbine engine compressor surge/stall events should not be taken lightly.
Best Regards, Rich