As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF RECEIVED A GEAR DISAGREE AND NOSE GEAR DOOR MESSAGE NOSE GEAR FAILED TO RETRACT (AIRCRAFT RETURNED TO FAY AFTER TAKEOFF--EMERGENCY DECLARED). FLT 4640 CX. FOUND CODE D046 ERR IN PSEU (NOSE GEAR RETRACT SOLENOID) (SELECTOR VALVE). REMOVED AND REPLACED NOSE GEAR SELECTOR VALVE IAW M/M 32-33-10. CYCLED GEARS 12X WITH NO DEFECTS, OPS AND LEAKS CHECK GOOD. ACFT OK FOR SERVICE. (S)