As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU ECU SELF TEST SHOWS FAULT - IGV ACT. PERFORMED APU ECU BITE TEST IAW AMM 49-61-05-742-045. NO FAULTS FOUND. BITE TEST PASSED. FOUND APU SHUTOFF VALVE STUCK IN CLOSED POSITION. RELEASED THE VALVE, SYSTEM CHECKED OK IAW AMM 49-11-00-802-002.