As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C RIGHT W ILES 1057.55, 21 V/C FLAP I/B ARM O/B RIB MULTI CRACKS FOUND DURING RIB INSTALLATION WITH RIVET (CRACK LENGTH 1 TO 3 INCH). RIGHT WING 21 VC FLAP I/B ARM O/B RIB TOP FLANGE REPAIRED AS PER HX RS R-57-41-35262 AND UPS EO B747-5740-21822-A.