As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, DURING ROLL OUT THE LT MLG FOLDED UP. BEFORE LANDING, ON FINAL APPROACH. THE GEAR WAS VERIFIED BY BOTH PILOTS THAT THE GEAR WAS DOWN AND LOCK WITH ALL GREEN LIGHTS AND ALL SYSTEMS NORMAL. AT THIS TIME NO VERIFICATION ON WHY THIS INCIDENT OCCURED. THIS WAS PART91 FLIGHT WITH ONLY 2 PILOTS ON BOARD. (SW15200606368) (K)