As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE FLIGHT 2217 THE CREW REPORTED THE NOSE GEAR WOULD NOT RETRACT. MAINTENANCE REPLACED THE NOSE GEAR UPLOCK BOX ASSEMBLY AND BOTH UPLOCK PROXIMITY SENSORS. OPERATIONAL CHECKS WERE GOOD. PROXIMITY SENSOR P/N 8-527-01 AND S/N'S OFF WERE 5105 AND15960.