As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKEOFF THE CREW WAS UNABLE TO MOVE THE LANDING GEAR LEVER INTO THE "UP" POSITION. THEY ELECTED TO RETURN, MAINTENANCE IS INVESTIGATING. RESOLUTION: RT MLG WOW SENSOR 2 REPLACED IAW AMM 32-62-03-000/400-801A. RT MLG SENSOR 2 HARNESS REPLACED IAW AMM 32-00-01-000/400-801-B. PSEM INPUTS IN CMC VERIFIED CORRECT. LANDING GEAR SWING CARRIED OUT. NO FAULTS. RETURN TO SERVICE, TEST CARRIED OUT. SYSTEM SERVICEABLE.