As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTS THE APU WOULD NOT START ON FIRST ATTEMPT. FAULT LIGHT ILLUMINATED. APU HAS A HISTORY OF MULTIPLE CSS ATTEMPTS WITH FAULT LIGHT. ACFT GROUNDED. REMOVED AND REPLACED THE APU FUEL CONTROL UNIT IAW AMM 49-31-11. LEAK AND OPS CHECKED GOOD. REMOVED AND REPLACED APU LUBE MODULE IAW AMM 49-91-11. LEAK AND OPS CHECKED GOOD. NO MAINTENANCE MESSAGE ON APU BITE.