As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT 6704, DUE TO REPORTS OF THE 4L DIFICAULT TO ARM. CORRECTIVE ACTION: INSTALLED SLIDE PIN ON 4L DOOR FOR MTC. INSPECTED AND PERFORM TEST OF GIRT BAR MECHANISM REF B757 AMM 52-11-25, FOUND GIRT BAR AFT SECURE CAM MISSING NUT AND NOT SECURED REF B757 IPC 52-11-20-34 ITEM 516, RESECURED CAM, OPS CHECKS GOOD. (LP 0371664)