Engine Crack or Mfg Artifact

[Rfisher30]

With 200 hrs total time on the 912 ULSengine and S7 airframe, during my first annual inspection we discovered on the #4 cylinder underside, what may be a crack or casting deformity. There are no indications of exhaust leakage. The two 100-hr engine inspection compression checks were rock solid. Metal appears to “span the gap” in several places.

I sent photos (uploaded w/post) & data to Rotax in a CSIR, and am waiting on a response and guidance. Has anyone else experienced this problem and might offer some guidance on how to proceed?

Any insight is appreciated.