As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE RT MLG RED UNSAFE LIGHT REMAINED ILLUMINATED WHEN GEAR WAS EXTENDED ON APPROACH. THE GEAR WAS CYCLED AND THE RED LIGHT EXTINGUISHED. MAINTENANCE FOUND THE RT MLG DOWNLOCK SENSOR TARGET GAP OUT OF LIMITS. THE SENSOR GAP WAS ADJUSTED IAW MM 32-61-31, PAGE 403. A GEAR SWING WAS PERFORMED WITH OPERATION AND INDICATIONS CHECKING GOOD.