As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FIRST TURNING ON OF BATTERY IN MORNING, LANDING LIGHT UPPER WAS ON AND WOULD NOT TURN OFF BY SWITCH. THIS IS THE SECOND RELAY INSTALLED FOR THE UPPER LANDING LIGHT ON THIS AIRCRAFT. TOTAL TIME OF THE RELAY IS UNKNOWN, BUT IS ALSO A PROBLEM FOR OTHER 407'S OPERATED HERE.