As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FAILED TO START AFTER 2 ATTEMPTS. PERFORMED FIM TASK 49-61-00 AND FOUND APU ECU AT FAULT. REMOVED AND REPLACED ECU IAW AMM 49-61-00. OPS CHECKED NORMAL. PERFORMED FIM TASK 49-61-00. FOUND APU STARTER T/R AT FAULT, REMOVED AND REPLACED IAW AMM 49-61-02. OPS CHECKED NORMAL.