As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR WOULD NOT RETRACT WHEN GEAR HANDLE SELECTED UP. GEAR HANDLE SELECTED DOWN AND GEAR INDICATIONS 3 GREEN. GEAR RELAY CIRCUIT BREAKER POPPED. LANDING WAS UNEVENTFUL. MAINTENANCE REPLACED DEFECTIVE LEFT GEAR SQUAT SWITCH. SUCCESSFUL OPERATIONAL CHECK FLIGHT PERFORMED. AIRCRAFT RETURNED TO SERVICE.