As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, AT THE OUTER MARKER THE GEAR WAS SELECTED DOWN AND THE INDICATIONS REMAINED RED. THE GEAR WAS RECYCLED AND OPERATED NORMALLY. *S/D* ACCOMPLISHED CHECK OF DOOR SENSORS AND WIRING. SWUNG GEAR SEVERAL TIMES AND COULD NOT DUPLICATE PROBLEM. SYSTEM OPERATIONALLY CHECKED GOOD WITH NO FURTHER PROBLEMS.