As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NEW WING ATTACHMENT BOLTS NDT'D PRIOR TO INSTALLATION REVEALED THAT 9 OUT OF 24 BOLTS (AN 7-23A) WERE REJECTED. BOLTS ARE MADE OF ROLLED STEEL AND THERE WAS AN INDICATION OF AN INCOMPLETE ROLLING PROCESS. SUBMITTER STATED IT IS UNKNOWN IF THE SEAMS WERE SURFACE OR PENETRATED INTO THE BOLT.