As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, UPON GEAR RETRACTION, EICAS WARNINGS ''NOSE DOOR OPEN'' AND ''GEAR DISAGREE'' ILLUMINATED. RETURNED TO LAX. REMOVED AND REPLACED NLG SELECTOR VALVE AND REPLACED PROX SENSOR. SWUNG GEAR, ALL CHECKS GOOD. NO LEAKS NOTED IAW MM 32-33-00.