As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR RETRACTION GEAR WOULDN'T RAISE. LANDING GEAR HANDLE CANNOT BE RAISED. COMPLETED ABNORMAL, GEAR RAISED NORMALLY. LANDING GEAR LEVER LOCK WAS IN POSITION NR 1 TO BEGIN. REPLACED PROXIMITY BOX IAW M/M 32-61-12. OPS CHECKED GOOD AT THIS TIME.