As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HFEC OPEN HOLE INSP CARRIED OUT AND FOUND ONE HOLE WITH CRACK INDICATION AT BS 340 UPPER DECK FLOORBEAM AFT FLANGE LBL 15 AT 6 O'CLOCK BY PLAIN VIEW. INSURANCE CUT ON FASTENER HOLE CARRIED-OUT PER SB 747-53A2439 REV 2. FINAL HOLE SIZE 0.341". HFEC INPECTION CARRIED-OUT PER NDTM D6-7170 REV 134 PART 6 51-00-00 FIG 16. NO CRACKED EVIDENT ON OVERSIZED HOLE.