As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - INFLIGHT DAY-DFW. CREW REPORTED AFTER TAKEOFF THE NOSE LANDING GEAR WOULD NOT RETRACT. EMERGENCY DECLARED FLIGHT DIVERTED ORD LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. SERVICED NOSE GEAR STRUT. SYSTEM GROUND CHECK NORMAL OPERATION.