As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE CREW NOTED THAT THE NLG DOORS DID NOT CLOSE AFTER THE GEAR WAS RETRACTED. THE ACFT RETURNED TO DEPARTURE AND LANDED WITHOUT INCIDENT. WHERE MX REPLACED THE NLG UPLOCK BOX PROXIMITY SWITCH, PERFORMED OPS TESTS AND CLEARED THE DISCREPANCY.