As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR DID NOT RETRACT AFTER T/O. WE HAD GREEN NOSE LIGHT AND RED UNLOCK LIGHT ILLUMINATED WHEN GEAR HANDLE WAS BROUGHT UP. ALL GEAR DOWN INDICATIONS WERE NORM WHEN GEAR HANDLE WAS PLACED DOWN FOR LANDING AFTER ALL APPROPRIATE CHECKLIST WERE COMPLETED. REMOVED FAULTY NOSE WHEEL STEERING UNIT AND INSTALLED EXCHANGE. RIG & LEAK CHECKS GOOD IAW MM 32-50-00, JACKED ACFT AND CYCLED GEAR. GEAR FUNCTIONAL CHECKS GOOD IAW MM 32-30-00