As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM CGF THE NLG WOULD NOT RETRACT UP & LOCK. THE CREW EXTENDED THE GEAR & RECEIVED INDICATION THAT ALL WERE DOWN & LOCKED. THE AIRCRAFT RETURNED TO CGF & LANDED WITHOUT FURTHER INCIDENT. MX FOUND THE NOSE GEAR STRUT LOW ON N² & WOULD NOT EXTEND FULLY WHILE ON JACKS. ALL THREE GEAR STRUTS WERE SERVICED AS REQUIRED & THE AIRCRAFT WAS RETURNED TO SERVICE. NOTE THE OAT WAS APPROXIMATELY -8°F.