As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER SELECTING GEAR HANDLE UP, BOTH MLG RETRACTED, NLG DID NOT. RECEIVED GEAR DISAGREE AND NOSE DOOR OPEN WARNING MESSAGE. QRH- LANDED WITHOUT INCIDENT. REF WO 183218 FOR R & R OF NLG SELECTOR VALVE AND NLG PRIORITY VALVE REF AMM 32-3. OPS AND LEAK CK GOOD.