As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, LANDING GEAR LEVER COULD NOT BE MOVED TO THE UP POSITION. RAN QRH AND DECIDED TO DECLARE AN EMERGENCY AND DIVERT TO JFK. LANDED WITHOUT INCIDENT. AIRCRAFT WAS FERRIED TO IND. MAINTENANCE SERVICED NOSE LANDING GEAR SHOCK STRUT IAW EMB 170 MM 12-12-09. JACKED A/C AND PERFORMED NUMEROUS GEAR SWINGS. NO FURTHER DEFECTS NOTED.