As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAD - FLT 1438 - DURING LANDING WITH GEAR HANDLE DOWN, LEFT MAIN GEAR INDICATOR NOT DOWN AND LOCKED. ACCOMPLISHED ABNORMAL CHECKLIST. LEFT MAIN GEAR VISUALLY VERIFIED DOWN AND LOCKED. LANDED WITHOUT INCIDENT. REPLACED LEFT MAIN GEAR DOWN LOCK SENSOR. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)