As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ANC-ATB - FLT 122 - ON TAKEOFF FROM ANC, NOSE LANDING GEAR FAILED TO RETRACT. AIRCRAFT RETURNED TO ANC AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND 'B' NUT ON NLG LOCK ACTUATOR LEAKING. TIGHTENED 'B' NUT, PERFORMED RETRACTION CHECK AND GEAR OPERATED NORMALLY. (M)