As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF RED LEFT GEAR LIGHT ON FWD INSTRUMENT PANEL REMAINS ILLUMINATED WITH GEAR HANDLE UP. CYCLED GEAR AS PER QRH AND REMAINED ILLUMINATED WITH GEAR HANDLE UP. REMOVED AND REPLACED LT MAIN GEAR UPLOCK PROX SWITCH PER 727 M/M 32-61-081-4. OPS CHECKED SENSOR PER M/M 32-61-081-4, OPS CKS GOOD. OK FOR SERVICE.