As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IN CRUISE, THE CREW NOTICED THE NR 3 START VALVE LIGHT ILLUMINATE. THE ENGINE WAS SHUTDOWN IAW THE CHECKLIST AND THE ACFT LANDED AT THE NEAREST SUITABLE AIRPORT. THE START VALVE AND PRESSURE SWITCH WERE REPLACED, AND THE ACFT RETURNED TO SERVICE.