As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT ARRIVED WITH A NLG STEERING SNAG. NLG WAS CHANGED WITH A SERVICABLE ASSY. THE ACFT TOOK OFF THE NEXT MORNING ON SCHEDULED DEPARTURE, IT RETURNED WITH A SNAG "LANDING GEAR FAILED TO RETRACT". UPON INVESTIGATION IT WAS DETERMINED THE FUSE PIN FOR THE EMERGENCY LANDING GEAR HYD SYS HAD FAILED TO BE RESET.