As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - FLT 1399 - DURING CRUISE, LEFT MAIN GEAR DOWN LOCK SWITCH MESSAGE WAS INTERMITTENT ON MFDU. AIRCRAFT LANDED IAH WITHOUT FURTHER INCIDENT. FOUND NR 2 DOOR LOCK SENSOR FAULTY. REPLACED NR 2 DOOR LOCK SENSOR AND ACCOMPLISHED PROXIMITY CHECK. SWUNG GEAR SEVERAL TIMES WITH NORMAL OPERATION. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)