As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR TOOK EXCESSIVELY LONG TO RETRACT ON TAKEOFF. NOSE GEAR DOORS WERE OPEN AMBER LIGHT ILLUMINATED AND GEAR WAS NOT LOCKED RED LIGHT ILLUMINATED WITH GEAR HANDLE LIGHT ILLUMINATED. NOSE GEAR FULLY RETRACTED 20 SECONDS AFTER MAIN GEAR RETRACTED. LANDING UNEVENTFUL. REMOVED FROM SERVICE. REPLACED THE INLINE FILTERS IN THE NOSE GEAR SEQUENCE VALVE. CHECKS GOOD. RETURNED TO SERVICE.