BO105 Airframe Cracking?
Dynamic Component: Whenever you have this kind of query it is generally a very useful first step to look throught the SB's and AD's issued against the specific type for any structural issues that may answer your question. Also, check the scheduled maintenance requirements in the MM for any structural inspections. if all else fails, call ECD product support and explain what your after. Do you know anyone at another BO105 operator you could ask?