As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - INFLIGHT LGA-ORD - CREW REPORTED NOSE GEAR WOULD NOT RETRACT. EMERGENCY DECLARED, DIVERTED JFK LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NOSE LANDING GEAR STRUT SEAL. SYSTEM GROUND CHECKED NORMAL OPERATION.