As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 963 - GUM - LEFT GEAR UP LIGHT DID NOT EXTINGUISH ON RETRACTION. ALL GEAR DOORS DID CLOSE. ALL OTHER INDICATIONS WERE NORMAL. MAINTENANCE FOUND LEFT GEAR UPLOCK SENSOR AT FAULT DURING GEAR UP SIMULATION OF PROX SENSORS. REPLACED SENSOR, PERFORMED GEAR SWING, OPERATION AND INDICATION NOW NORMAL. (Z)