As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE LEFT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER LANDING GEAR RETRACTION. RECYCLED LANDING GEAR AND LIGHT REMAINED ILLUMINATED. AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED THE LEFT MAIN LANDING GEAR UP LIMIT SWITCH. OPERATIONAL CHECK GOOD.