As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ACCOMPLISHMENT OF AD 2016-05-12, AND SERVICE BULLETIN 747-53A2507 REV 2, FOUND BS 1200 LEFT FRAME TO HAVE 9 EACH FASTENER HOLES TO HAVE CRACK INDICATIONS AND 3 FASTENER HOLES ON THE TENSION TIE CHANNEL WITH CRACK INDICATIONS. ACCOMPLISHED OVERSIZE FASTENER HOLE REPAIR AT ALL CRACKED FASTENER LOCATIONS IAW SERVICE BULLETIN 747-53A2507 REVISION 2.