As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION AT NRT, A 41 INCH CRACK WAS FOUND ON THE LEFT WING FIXED LEADING EDGE UPPER SKIN PANEL. THE DAMAGED SKIN PANEL IS LOCATED OUTBOARD OF WS 499.02 AND INBOARD TO THE NR 2 ENGINE. ACCOMPLISHED INTERIM SANDWICH DOUBLER REPAIR. PERMANENT REPAIR TO BE ACCOMPLISHED AT NEXT C-CHECK. PART TOTAL CYCLES, 2,663.