As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT THE NR 2 ENGINE STARTED NORMALLY, THEY THEN MOVED THE START SELECT SWITCH INTO THE NR 1 POSITION, THE NR 1 STARTER AUTOMATICALLY ENGAGED WITHOUT ENGAGING THE START SWITCH. TROUBLESHOOTING IDENTIFIED START SWITCH TO BE DEFECTIVE. THE SWITCH WAS REMOVED AND REPLACED WITH A NEW UNIT. FUNCTIONAL CHECKS SATISFACTORY.