As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DISAGREE LIGHT ON. FLY-BY CONFIRMED NOSE GEAR NOT DOWN AND DOORS NOT OPEN. GEAR WAS EXTENDED BY ALTERNATE METHOD. *S/D* NOSE LANDING GEAR FAILED TO EXTEND DUE TO A FAILURE OF THE NOSE LANDING GEAR SELECTOR BYPASS VALVE (3910028-101). THE SELECTOR BYPASS VALVE WAS REMOVED AND REPLACED.