As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SLIGHT ELECTRICAL BURNING SMELL NOTED IN COCKPIT BY PILOTS. LANDING LIGHT CIRCUIT BREAKER SWITCH FOUND FUSED IN THE ON POSITION AND VERY WARM TO TOUCH. TOGGLE COULD BE MOVED WITH NO RESISTANCE. AIRCRAFT USED IN TRAINING AND HIGH USAGE MAY BE CAUSE OF DIFFICULTY.