As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LANDING GEAR FAILED TO RETRACT AFTER TAKEOFF, THE HANDLE WOULD NOT MOVE. THE AIRCRAFT RETURNED TO FIELD WITHOUT INCIDENT. MAINTENANCE REPACKED THE LANDING GEAR STRUT DUE TO A FLUID LEAK AND POSSIBLE IMPROPER REPACK OF THE GEAR FROM THE PREVIOUS NIGHT. THE GEAR WAS SWUNG AND THE AIRCRAFT WAS RETURNED TO SERVICE.