As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 STARTER/GENERATOR FAILED. DURING START, THE ENGINE TOOK AN UNUSUALLY LONG TIME TO REACH LIGHT OFF AND IDLE SPEED. AFTER ENGINE START, THE GENERATOR WOULD NOT COME ON LINE. AFTER THE ACFT RETURNED TO THE MAINTENANCE FACILITY, THE STARTER WAS EXAMINED AND THE INTERNAL DAMAGE WAS FOUND TO THE BRUSHES, BRUSH HOLDER CLIPS, ETC. THE STARTER/GENERATOR WAS REPLACED. ALL SYSTEMS CHECKED GOOD.