As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE DOOR OPEN WARNING MSG AND GEAR DISAGREE WARNING MSG UPON GEAR RETRACTION. MAIN GEAR RETRACTED, NOSE GEAR INDICATED DN. / PERFORMED QRH PROCEDURE(S). (FLIGHT# 4033 - FILED CLOSED) REMOVED AND REPLACED NLG OLEO SENSOR BRACKET WITH A SERVICABLE UNIT. REF CMM 32-20-04 & AMM 32-61-05. PERFORMED OPS CHECK OF NLG EXTENSION/ RETRACTION SYSTEM WITH NO DEFECTS NOTED. REF AMM 32-33-00.