As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1864 - CLT-PVD - ODI(AT) - ON GEAR RETRACTION, LEFT MAIN GEAR RED LIGHT STAYED ON. CREW ACCOMPLISHED QRH PROCEDURES AND GEAR EXTENDED NORMALLY. FLIGHT RETURNED TO FIELD AT CLT. MAINTENANCE TROUBLESHOT MAIN GEAR PER AMM 32-61-00-101 FIG 105 & AMM 32-61-00-725-001. FOUND LEFT MAIN GEAR UPLOCK SENSOR BAD. REPLACED LEFT MAIN GEAR UPLOCK SENSOR PER AMM 32-61-21-004-001 & 32-61-21-404-005. OPS CHECKED PER AMM 32-61-21-501. OPS CHECK OK.