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.