As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF LANDING GEAR HANDLE WOULD NOT RAISE ABOVE NEUTRAL POSITION, WITH SYSTEM NR 1 SELECTED. EMER PUSH BUTTON WAS PRESSED AND GEAR HANDLE WAS MOVED TO THE UP POSITION. GEAR RETRACTED. REPLACED PROXIMITY DETECTOR UNIT IAW M/M 32-61-12; OPS CHECKED GOOD.