As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NLG DID NOT EXTEND IN FLT. RAN ALT EXTEND CHECKLIST & GOT GREEN LIGHTS. NORMAL LANDING. REPLACED NLG SEQUENCE VALVE. AFTER REPLACEMENT OF SEQUENCE VALVE ACCOMPLISHED NOSE GEAR EXTENSION AND RETRACTION TEST NUMEROUS TIMES AND GEAR. OPS CHECKED NORMAL. NO LEAKS AT VALVE.