As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING GEAR RETRACTION, THE LEFT GEAR ON SAFE INDICATOR REMAINED ILLUMINATED. GEAR WAS CYCLED DOWN AND UP, ALL GEAR INDICATIONS WERE NORMAL. REPLACED LANDING GEAR ACCESSORY BOX AND ADJUSTED LEFT MAIN LANDING GEAR SENSOR. PERFORMED GEAR OPERATIONAL CHECK, CHECKED OK.