As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER T/O, ON LANDDINGG RETRACTION, LT AMBER & RED MAIN LANDING LIGHTS ILLUMINATED. ON VISUAL CONFIRMATION, LANDING GEAR DOOR (LT) APPERAED OPEN & LT MAIN LANDING RETRACTED. AFTER FURTHER INVESTIGATION, FOUND ONE SPRING BROKEN INSIDE THE LT MLG UP LOCK. UP LOCK REPLACED AND A/C RETURNED TO SERVICE. (TC# 20180706020)