As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE RIGHT WING LANDING GEAR RED WARNING LIGHT REMAINED ILLUMINATED AFTER LANDING GEAR RETRACTION. RECYCLED LANDING GEAR AND LIGHT EXTINGUISHED. AIRCRAFT CONTINUED TO NRT AND LANDED WITHOUT INCIDENT. REPLACED THE RIGHT WING LANDING GEAR PRIMARY DOWNLOCK SENSOR, OPERATIONAL CHECK GOOD.