As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O FROM JFK LANDING GEAR WOULD NOT RETRACT AND NOSE WHEEL STEERING MSG ILLUMINATED. A/C RETURNED TO JFK LANDED SAFELY. INSPECTED A/C FOUND NLG STRUT BOTTOMED OUT. SERVICED NLG STRUT WITH NITROGEN. GEAR SWING CHECKS GOOD. NO FURTHER DEFECTS.