As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR WOULD NOT RETRACT. RETURN TO DEPARTURE, LANDED AT 46000 LBS. RECEIVED NOG INDICATION AND AURAL WARNING APPROX 6 SECONDS AFTER SELECTED UP. ALSO, HAD NOSE DOOR MESSAGE. ALTERNATE EXTENSION. R & R NLG SELECTOR VALVE IAW AMM 32-33-10. OPS CHECKS GOOD. C/W