As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING A HEAVY CHECK INSPECTION A CRACK IN RIB 5 ON THE LT SIDE WAS FOUND TO BE CRACKED JUST FWD OF THE FWD LIGHTENING HOLE. THE CRACK RUNS VERTICALLY FROM THE BOTTOM FLANGE UP. THE CRACK WAS VISIBLE LOOKING THROUGH PANEL 532AB LOOKING INBOARD THRU LIGHTENING HOLE IN RIB 6.