As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUSELAGE CENTER WING BOX REAR SPAR & BOTTOM PANEL HAS A CRACK SIGNAL. REAMED THE CRACK LAYERS OF HOLE BY 0.4MM STEP BY STEP UNTIL CRACK REMOVAL IAW SRM 51-40-44 . PERFORMED ROTO-TEST INSPECTION IAW NTM 51-10-01. NO CRACK FOUND. MAJOR REPAIR IAW GMM 6-2-100.