As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - INFLIGHT AFTER TAKEOFF LANDING GEAR HANDLE WOULD NOT MOVE TO THE UP POSITION. UNABLE TO RETRACT NOSE LANDING GEAR. LANDED JFK WITHOUT INCIDENT. FOUND NOSE GEAR PISTON BENT. REPLACED NOSE LANDING GEAR STRUT AND PISTON. SYSTEM GROUND CHECKED NORMAL OPERATION.