As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOLLOWING ALTERNATE GEAR EXTENSION CHECK IN FLIGHT, THE NOSE GEAR FAILED TO RETRACT USING THE L6TU. THE AIRCRAFT WAS GROUNDED. MAINTENANCE OBSERVER STATED BOTH THE MAIN GEAR RETRACTED NORMAL. REPLACED THE RETRACT ACTUATOR IAW AMM 32-33-11. OPS CHECKED NORMAL, NO LEAKS NOTED.