As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAILED TO START AND THE APU FAULT LIGHT ILLUMINATED. REPLACED STARTER GENERATOR IAW AMM 49-41-21-000-801 AND 49-41-21-400-801. R & R START CONVERTER UNIT IAW AMM 49-41-61-000-801 AND 49-41-61-400-801 STARTER APU IAW AMM 49-11-00-860-801. GROUND OPERATION NORMAL.