As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GEAR RETRACTION, RECEIVED EICAS MESSAGE GEAR DISAGREE DISPLAYED WITH GEAR HANDLE UP. CYCLED GEAR, MESSAGE AND GEAR LIGHTS EXTINGUISHED. AIRCRAFT LANDED WITHOUT INCIDENT IN DTW. REPLACED NOSE GEAR BYPASS SEQUENCE VALVE. PERFORMED EXTENSION AND RETRACTION TEST OF GEAR, OPERATIONAL CHECK OK.