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 AFTER TAKEOFF. FLIGHT RETURNED TO POINT OF DEPARTURE/OVERWEIGHT LANDING APPROX 1800KGS, R/I UPLOCK ON SPEC FOUND MOSITURE IN UPLOCK, PER 32-32-03-000-801-A AND 32-32-03-400-801-A. UPLOCK BLED, 50 FLIGHT CONTROL ACTUATIONS 18 GEAR SWINGS 10 BRAKE ACUATIONS COMPLETED WITH ENGINES RUNNING.