As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER TAKEOFF THE FLIGHT CREW REPORTED THAT THE NR 1 DC GENERATOR HOT CAUTION LIGHT ILLUMINATED. THE LIGHT WENT OUT AFTER GENERATOR WAS SELECTED OFF.AIRCRAFT RETURNED TO YYC AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 1 STARTER GENERATOR, S/N ON 958, S/N OFF 959 AND COMPLETED GROUND RUNS - NO FAULTS FOUND - SYSTEM CHECKED SERVICEABLE. AIRCRAFT RETURNED TO SERVICE WITH NO FURTHER INCIDENTS TO REPORT.