As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE, THE NOSE GEAR FAILED TO RETRACT AND STAYED EXTENDED FOR APPROX 2 MIN. THE NOSE GEAR RETRACTED ON ITS OWN WITHOUT FURTHER INPUT AND EXTENDED NORMALLY UPON LANDING. DIVERTED, LANDING UNEVENTFUL. BYPASSING DETECTED USING ULTRAPROBE BY PRESSURIZING & CHECKING FOR HEAT & NOISE. REMOVED AND REPLACED NLG LOCK ACTUATOR IAW AMM TASK 32-31-51-000-801, AND TASK 32-31-51-400-801. OPS CHECKED GOOD AND LEAK CHECKED GOOD.