As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
"GEAR DISAGREE" MESSAGE APPEARED ON FINAL APPROACH TO SMF FOR THE NOSE. UPON CYCLING THE GEAR AFTER 30 SECONDS, THE GEAR OPERATED NORMALLY WITH NO DELAY. REPLACED NOSE GEAR SELECTOR VALVE, ALL IAW AMM 32-33-10. OPERATIONAL CHECKS GOOD.