As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C FX LAP JOINT AT BS 1867 TO 1877 STR 46L FOUND LOSS OF SKIN THICKNESS DUE PREVIOUSLY BLENDED 0.013 X .5 X 4 INCH. LAP JOINT OPENED UP FOR INSPECTION FOR DEFECTS FREE, LAP JOINT REINSTALLED PER HX RS R-53-60-35259 AND UPS EO B747-5330-21779-A.