As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON GEAR UP, RECEIVED MLG LEVER DISAGREE MESSAGE AND RT MLG NOT LOCKED INDICATION. CYCLED MLG AND RECEIVED SAME INDICATIONS. EXTENDED MLG AND RETURNED TO BASE NORMALLY. TROUBLESHOOTING REVEALED A FAILED RT MLG UPLOCK ASSY. UPLOCK REPLACED AND TESTED IAW MM & ACFT APPROVED FOR RETURN TO SERVICE.