As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKE-OFF PILOT SELECTED THE GEAR HANDLE TO THE UP POSITION. THE GEAR WOULD NOT RETRACT. AIRCRAFT RETURN TO MAINTENANCE BASE. MAINTENANCE TECH FOUND RT TRUNNION SWITCH AT FAULT. SWITCH REPLACED AND LANDING GEAR SYSTEM SWUNG. AIRCRAFT RETURN TO SERVICE.