As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR FAILED TO RETRACT. GEAR UNSAFE LIGHT AND NOSE GEAR DOWN LIGHT REMAINED ON. MAIN GEAR RETRACTED PROPERLY. JACK ACFT, TROUBLESHOOT SYS TO A FAULTY NOSE STEERING UNIT FAILED TO CTR. REMOVED OLD NOSE STEERING UNIT. INSTALLED AND RIGGED THE O/H UNIT. OPS AND LEAK CHECK WAS GOOD. GEAR SWINGS AND CTR SYS CHECKED GOOD. DOWN JACK ACFT. ALL WORK DONE IAW CH 32-50-00 OF THE MM.