As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUR CRACKS FOUND ON THIS RIB, TWO ON THE LT SIDE AND TWO ON THE RT SIDE LOCATED ON STRINGER TO RIB INTERSECTION ON THE FIRST RIVET HOLE. RT STRINGER P/N 101-640000-46 & 101-640000-38. LT STRINGER P/N 101-640000-39 & 101-640000-45.