As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX FLIGHT 2427. ON DESCENT AT 265 KNOTS THE RT MAIN GEAR DOOR AND UNSAFE LIGHTS ILLUMINATED FOR A MOMENT. THERE WAS A YAWING MOTING ASSOCIATED WITH THE INDICATION. MX REPLACED THE RT UPLOCK PROX SENSOR AND ADJUSTED THE LT UPLOCK PROX SENSOR. CHECKS GOOD. ACFT RETURNED TO SERVICE.