As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING GEAR EXTENTION THE RT MLG SHOWED A AMBER UNKNOWN POSITION THEN A RED UNSAFE POSITION. AFTER A MINUTE IT SHOWED A DOWN AND LOCKED POSITION. REMOVED RT MLG HYD ACTUATOR AND INSTALLED MODIFIED UNIT IAW CMP 321004. OPS AND LEAK CHECKS GOOD.