As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GEAR UPLATCH CHECK FAILED. FOLLOWED CHECK LIST. CHECK STILL FAILED. BOTH DOORS NOT LATCHED AND GEAR NOT LATCHED LIGHTS ILLUMINATED. BOTH ALTERNATE GEAR (MAIN) DOOR LIGHTS ALSO ILLUMINATED DURING UPLATCH CHECK. MAIN GEAR DOOR LIGHT SWITCH MOVED LEFT DOOR NOT LATCHED LIGHT WENT OUT. MOVED RIGHT, LIGHT STAYED ON.