As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF THE LANDING GEAR FAILED TO RETRACT. LANDING GEAR CB WAS POPPED. PILOT ELECTED TO RETURN TO THE AIRFIELD AND LANDED UNEVENTFULLY. SUBSEQUENT INVESTIGATION FOUND THE LANDING GEAR REMOTE CIRCUIT BREAKER HAD VERY HIGH RESISTANCE IN THE CLOSED POSITION.