As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAX INFLIGHT T1407/29SEP. CREW REPORTED RT RED MAIN LANDING GEAR WARNING REMAINED ON AFTER GEAR EXTENDED. EXTENDED GEAR MANUALLY AND PERFORMED FLY BY. LANDED LAX WITHOUT INCIDENT. REPLACED RT GEAR PROXIMITY SENSOR. SYSTEM GROUND CHECKED NORMAL OPS.