As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THAT AFTER TAKEOFF, THE LANDING GEAR WOULD NOT RETRACT WHEN SELECTED TO THE UP POSITION. THE AIRCRAFT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT WITH NO OBVIOUS DEFECTS NOTED. THE CMC WAS CHECKED AND HAD A MESSAGE FOR LGEU FAIL. THE AIRCRAFT WAS THEN FERRIED TO KMKE FOR FURTHER TROUBLESHOOTING. IN KMKE WHILE TROUBLESHOOTING AN IC 1/2 WOW FAIL MESSAGE WOULD APPEAR WHEN THE AIRCRAFT WAS RAISED OFF THE GROUND ON JACKS. THE LGEU WAS REPLACED AND A FULL SERVICE WAS PERFORMED ON THE NOSE LANDING GEAR WITH NO FURTHER DEFECTS NOTED.