As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR GREEN DOWN LIGHT OFF WITH GEAR HANDLE DOWN. EICAS MESSAGE 'GEAR DISAGREE' DISPLAYED. DOORS AMBER LIGHT OFF. GEAR LIGHT WAS ON. INDICATIONS WERE NORMAL AFTER ALT GEAR EXT. CREW DOESN'T BELIEVE DOORS LIGHT WAS ON PRIOR TO ALT EXTENSION. REPLACED NOSE GEAR OPERATED SEQUENCE VALVE. OPS CHECKED NLG NORMAL AND ALTERNATE EXTENSION & RETRACTION OK.