As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB DUE NOSE GEAR WILL NOT RETRACT WITH A GEAR DISAGREE AND GEAR DOOR MESSAGES. REPLACED THE NOSE GEAR LOCK ACTUATOR, SEQUENCE VALVE, INTERLOCK SOLENOID AND ADJUSTED SEQUENCE VALVE. GEAR SWING AND OPS CHECKS OK. VERIFICATION FLT COMPLETE.