As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAULT LIGHT ILLUMINATED AFTER 2 START ATTEMPTS. ACFT GROUNDED. ACCOMPLISHED FIM 49-40 TASK 803, STEPS E. (1)-F.(4). NO FAULTS FOUND. REMOVED AND REPLACED THE STARTER GENERATOR IAW AMM 49-41-21-000-801, AND 400-801 OPS CHECKED GOOD.