As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU DID NOT SHUTDOWN WHEN APU SWITCH POSITIONED TO OFF AT ETOPS EXIT POINT. APU CONTINUED PRODUCING NORMAL VOLTS AND FREQS FOR DURATION OF FLIGHT. CYCLED APU SWITCH NORMAL SHUTDOWN OCCURRED. PERFORMED MULTIPLE MORE START RUN SHUTDOWN CYCLES NO DEFECTS NOTED. SYSTEM CHECKS NORMAL PER 49 11 00 860 802.