As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU SHUTDOWN WHEN SWITCHING FROM EXT PWR TO APU GEN.(<P>PERFORMED APU BITE IAW B767 FIM 49-11 FT 987. NO FAULTS OR ABNORMAL SHUTDOWN ECU. STARTED APU IAW B767 AMM 49-11-00. PERFORMED POWER TRANSFER AND OPS CHK OF APU GENERATOR IAW B767 AMM 24-21-00, OPS CHECK OK.<BR /></P>)