As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE COMPLYING WITH THE REPLACEMENT OF THE RHS MLG TRUNNION FITTING (REF 601R-57-21-3318) 2EA MISDRILLED HOLES (0.125" DIA) WERE FOUND IN THE LOWER AFT WING PLANK. (REF SB). NOTE 9 RIVET ARE NOT INSTALLED THROUGH THE LOWER AFT WING PLANK. (C-CHECK) RO 8/28/2020 REPAIRED MISDRILLED HOLES IN RH WING LOWER AFT PLANK PER REO.