As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI OUT, FLT CONT CHK WITH FULL RUDDER DEFLECTION, METALLIC CLANG IS HEARD IN F/OS RUDDER PEDAL BAY. INSTALLED RIG PIN IN RUDDER SYS FWD PERF STATIC RIG CHK OF RUDDER CONT SYS FROM FWD QUADRANT TO AFT QUADRANT. ALL RIG PINS INSTALL AT QUADRANTS. REMOVED ALL RIG PINS.