As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT MLG LANDING GEAR RETRACTION DID NOT RETRACT - ON GEAR RETRACTION LEFT MAIN GREEN DOWN LIGHT STAYED ON. NO OTHER LIGHTS ON. GEAR EXTENSION WAS THEN NORMAL. JACKED AIRCRAFT AND RETRACKED GEAR LMG GREEN LIGHT REMAINED ON. REMOVED CONNECTOR ON LMG AND CHECKED SWITCH FOUND DOWNLOCK SWITCH FAULTY. REPLACED LEFT GEAR DOWN AND LOCKED SWITCH WITH NEW IAW CE-680 MM CH 32-60-00. PERFORMANCED GEAR SWINGS WITH NO DEFECTS NOTED.